mirror of
https://github.com/RPCSX/rpcsx.git
synced 2024-11-26 21:00:35 +00:00
orbis-kernel: Add SharedAtomic utility
Initial shared atomic implementation for Darwin
This commit is contained in:
DH
parent
d83a0723a7
commit
7d0f277ad5
@ -3,6 +3,7 @@ set(CMAKE_POSITION_INDEPENDENT_CODE on)
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add_library(obj.orbis-utils-ipc OBJECT
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src/utils/SharedMutex.cpp
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src/utils/SharedCV.cpp
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src/utils/SharedAtomic.cpp
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)
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add_library(obj.orbis-kernel OBJECT
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src/module.cpp
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@ -89,6 +90,12 @@ target_include_directories(obj.orbis-utils-ipc
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${CMAKE_CURRENT_SOURCE_DIR}/include/orbis
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)
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if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
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target_compile_definitions(obj.orbis-utils-ipc PUBLIC ORBIS_HAS_FUTEX)
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elseif(${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
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target_compile_definitions(obj.orbis-utils-ipc PUBLIC ORBIS_HAS_ULOCK)
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endif()
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add_library(orbis-utils-ipc STATIC)
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add_library(orbis-kernel STATIC)
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add_library(orbis-kernel-shared SHARED)
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@ -2,3 +2,165 @@
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#include "error/ErrorCode.hpp" // IWYU pragma: export
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#include "error/SysResult.hpp" // IWYU pragma: export
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#include <system_error>
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namespace orbis {
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static orbis::ErrorCode toErrorCode(std::errc errc) {
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if (errc == std::errc{}) {
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return {};
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}
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switch (errc) {
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case std::errc::address_family_not_supported:
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return orbis::ErrorCode::AFNOSUPPORT;
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case std::errc::address_in_use:
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return orbis::ErrorCode::ADDRINUSE;
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case std::errc::address_not_available:
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return orbis::ErrorCode::ADDRNOTAVAIL;
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case std::errc::already_connected:
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return orbis::ErrorCode::ISCONN;
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case std::errc::argument_out_of_domain:
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return orbis::ErrorCode::DOM;
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case std::errc::bad_address:
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return orbis::ErrorCode::FAULT;
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case std::errc::bad_file_descriptor:
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return orbis::ErrorCode::BADF;
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case std::errc::bad_message:
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return orbis::ErrorCode::BADMSG;
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case std::errc::broken_pipe:
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return orbis::ErrorCode::PIPE;
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case std::errc::connection_aborted:
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return orbis::ErrorCode::CONNABORTED;
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case std::errc::connection_already_in_progress:
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return orbis::ErrorCode::ALREADY;
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case std::errc::connection_refused:
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return orbis::ErrorCode::CONNREFUSED;
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case std::errc::connection_reset:
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return orbis::ErrorCode::CONNRESET;
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case std::errc::cross_device_link:
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return orbis::ErrorCode::XDEV;
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case std::errc::destination_address_required:
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return orbis::ErrorCode::DESTADDRREQ;
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case std::errc::device_or_resource_busy:
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return orbis::ErrorCode::BUSY;
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case std::errc::directory_not_empty:
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return orbis::ErrorCode::NOTEMPTY;
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case std::errc::executable_format_error:
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return orbis::ErrorCode::NOEXEC;
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case std::errc::file_exists:
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return orbis::ErrorCode::EXIST;
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case std::errc::file_too_large:
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return orbis::ErrorCode::FBIG;
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case std::errc::filename_too_long:
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return orbis::ErrorCode::NAMETOOLONG;
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case std::errc::function_not_supported:
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return orbis::ErrorCode::NOSYS;
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case std::errc::host_unreachable:
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return orbis::ErrorCode::HOSTUNREACH;
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case std::errc::identifier_removed:
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return orbis::ErrorCode::IDRM;
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case std::errc::illegal_byte_sequence:
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return orbis::ErrorCode::ILSEQ;
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case std::errc::inappropriate_io_control_operation:
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return orbis::ErrorCode::NOTTY;
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case std::errc::interrupted:
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return orbis::ErrorCode::INTR;
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case std::errc::invalid_argument:
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return orbis::ErrorCode::INVAL;
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case std::errc::invalid_seek:
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return orbis::ErrorCode::SPIPE;
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case std::errc::io_error:
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return orbis::ErrorCode::IO;
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case std::errc::is_a_directory:
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return orbis::ErrorCode::ISDIR;
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case std::errc::message_size:
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return orbis::ErrorCode::MSGSIZE;
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case std::errc::network_down:
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return orbis::ErrorCode::NETDOWN;
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case std::errc::network_reset:
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return orbis::ErrorCode::NETRESET;
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case std::errc::network_unreachable:
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return orbis::ErrorCode::NETUNREACH;
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case std::errc::no_buffer_space:
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return orbis::ErrorCode::NOBUFS;
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case std::errc::no_child_process:
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return orbis::ErrorCode::CHILD;
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case std::errc::no_link:
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return orbis::ErrorCode::NOLINK;
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case std::errc::no_lock_available:
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return orbis::ErrorCode::NOLCK;
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case std::errc::no_message:
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return orbis::ErrorCode::NOMSG;
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case std::errc::no_protocol_option:
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return orbis::ErrorCode::NOPROTOOPT;
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case std::errc::no_space_on_device:
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return orbis::ErrorCode::NOSPC;
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case std::errc::no_such_device_or_address:
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return orbis::ErrorCode::NXIO;
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case std::errc::no_such_device:
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return orbis::ErrorCode::NODEV;
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case std::errc::no_such_file_or_directory:
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return orbis::ErrorCode::NOENT;
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case std::errc::no_such_process:
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return orbis::ErrorCode::SRCH;
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case std::errc::not_a_directory:
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return orbis::ErrorCode::NOTDIR;
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case std::errc::not_a_socket:
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return orbis::ErrorCode::NOTSOCK;
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case std::errc::not_connected:
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return orbis::ErrorCode::NOTCONN;
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case std::errc::not_enough_memory:
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return orbis::ErrorCode::NOMEM;
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case std::errc::not_supported:
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return orbis::ErrorCode::NOTSUP;
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case std::errc::operation_canceled:
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return orbis::ErrorCode::CANCELED;
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case std::errc::operation_in_progress:
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return orbis::ErrorCode::INPROGRESS;
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case std::errc::operation_not_permitted:
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return orbis::ErrorCode::PERM;
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case std::errc::operation_would_block:
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return orbis::ErrorCode::WOULDBLOCK;
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case std::errc::permission_denied:
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return orbis::ErrorCode::ACCES;
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case std::errc::protocol_error:
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return orbis::ErrorCode::PROTO;
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case std::errc::protocol_not_supported:
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return orbis::ErrorCode::PROTONOSUPPORT;
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case std::errc::read_only_file_system:
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return orbis::ErrorCode::ROFS;
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case std::errc::resource_deadlock_would_occur:
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return orbis::ErrorCode::DEADLK;
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case std::errc::result_out_of_range:
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return orbis::ErrorCode::RANGE;
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case std::errc::text_file_busy:
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return orbis::ErrorCode::TXTBSY;
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case std::errc::timed_out:
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return orbis::ErrorCode::TIMEDOUT;
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case std::errc::too_many_files_open_in_system:
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return orbis::ErrorCode::NFILE;
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case std::errc::too_many_files_open:
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return orbis::ErrorCode::MFILE;
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case std::errc::too_many_links:
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return orbis::ErrorCode::MLINK;
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case std::errc::too_many_symbolic_link_levels:
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return orbis::ErrorCode::LOOP;
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case std::errc::value_too_large:
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return orbis::ErrorCode::OVERFLOW;
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case std::errc::wrong_protocol_type:
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return orbis::ErrorCode::PROTOTYPE;
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default:
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return orbis::ErrorCode::FAULT;
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}
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}
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inline constexpr orbis::ErrorCode toErrorCode(const std::error_code &code) {
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if (!code) {
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return {};
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}
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if (code.category() != std::generic_category()) {
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return orbis::ErrorCode::DOOFUS;
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}
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return toErrorCode(static_cast<std::errc>(code.value()));
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}
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} // namespace orbis
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165
orbis-kernel/include/orbis/utils/SharedAtomic.hpp
Normal file
165
orbis-kernel/include/orbis/utils/SharedAtomic.hpp
Normal file
@ -0,0 +1,165 @@
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#pragma once
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#include <atomic>
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#include <chrono>
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#include <cstdint>
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#include <functional>
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#include <limits>
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#include <system_error>
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#include <thread>
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#include <type_traits>
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namespace orbis {
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inline void yield() { std::this_thread::yield(); }
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inline void relax() {
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#if defined(__GNUC__) && (defined __i386__ || defined __x86_64__)
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__builtin_ia32_pause();
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#else
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yield();
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#endif
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}
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static constexpr auto kRelaxSpinCount = 12;
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static constexpr auto kSpinCount = 16;
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inline namespace utils {
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bool try_spin_wait(auto &&pred) {
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for (std::size_t i = 0; i < kSpinCount; ++i) {
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if (pred()) {
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return true;
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}
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if (i < kRelaxSpinCount) {
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relax();
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} else {
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yield();
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}
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}
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return false;
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}
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bool spin_wait(auto &&pred, auto &&spinCond) {
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if (try_spin_wait(pred)) {
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return true;
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}
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while (spinCond()) {
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if (pred()) {
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return true;
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}
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}
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return false;
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}
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struct shared_atomic32 : std::atomic<std::uint32_t> {
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using atomic::atomic;
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using atomic::operator=;
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template <typename Clock, typename Dur>
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[[nodiscard]] std::errc wait(std::uint32_t oldValue,
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std::chrono::time_point<Clock, Dur> timeout) {
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if (try_spin_wait(
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[&] { return load(std::memory_order::acquire) != oldValue; })) {
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return {};
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}
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auto now = Clock::now();
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if (timeout < now) {
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return std::errc::timed_out;
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}
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return wait_impl(
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oldValue,
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std::chrono::duration_cast<std::chrono::microseconds>(timeout - now));
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}
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[[nodiscard]] std::errc wait(std::uint32_t oldValue,
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std::chrono::microseconds usec_timeout) {
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return wait_impl(oldValue, usec_timeout);
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}
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[[nodiscard]] std::errc wait(std::uint32_t oldValue) {
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if (try_spin_wait(
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[&] { return load(std::memory_order::acquire) != oldValue; })) {
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return {};
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}
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return wait_impl(oldValue);
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}
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auto wait(auto &fn) -> decltype(fn(std::declval<std::uint32_t &>())) {
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while (true) {
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std::uint32_t lastValue;
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if (try_spin_wait([&] {
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lastValue = load(std::memory_order::acquire);
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return fn(lastValue);
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})) {
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return;
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}
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while (wait_impl(lastValue) != std::errc{}) {
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}
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}
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}
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int notify_one() const { return notify_n(1); }
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int notify_all() const { return notify_n(std::numeric_limits<int>::max()); }
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int notify_n(int count) const;
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// Atomic operation; returns old value, or pair of old value and return value
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// (cancel op if evaluates to false)
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template <typename F, typename RT = std::invoke_result_t<F, std::uint32_t &>>
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std::conditional_t<std::is_void_v<RT>, std::uint32_t,
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std::pair<std::uint32_t, RT>>
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fetch_op(F &&func) {
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std::uint32_t _new;
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std::uint32_t old = load(std::memory_order::relaxed);
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while (true) {
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_new = old;
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if constexpr (std::is_void_v<RT>) {
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std::invoke(std::forward<F>(func), _new);
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if (compare_exchange_strong(old, _new)) [[likely]] {
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return old;
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}
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} else {
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RT ret = std::invoke(std::forward<F>(func), _new);
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if (!ret || compare_exchange_strong(old, _new)) [[likely]] {
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return {old, std::move(ret)};
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}
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}
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}
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}
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// Atomic operation; returns function result value
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template <typename F, typename RT = std::invoke_result_t<F, std::uint32_t &>>
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RT op(F &&func) {
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std::uint32_t _new;
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std::uint32_t old = load(std::memory_order::relaxed);
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while (true) {
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_new = old;
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if constexpr (std::is_void_v<RT>) {
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std::invoke(std::forward<F>(func), _new);
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if (compare_exchange_strong(old, _new)) [[likely]] {
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return;
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}
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} else {
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RT result = std::invoke(std::forward<F>(func), _new);
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if (compare_exchange_strong(old, _new)) [[likely]] {
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return result;
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}
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}
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}
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}
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private:
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[[nodiscard]] std::errc wait_impl(std::uint32_t oldValue,
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std::chrono::microseconds usec_timeout =
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std::chrono::microseconds::max());
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};
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} // namespace utils
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} // namespace orbis
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@ -1,8 +1,12 @@
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#pragma once
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#include "orbis/utils/SharedAtomic.hpp"
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#include <chrono>
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#include <cstdint>
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#include <mutex>
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#include <orbis/utils/AtomicOp.hpp>
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#include <orbis/utils/SharedMutex.hpp>
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#include <system_error>
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namespace orbis {
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inline namespace utils {
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@ -11,16 +15,18 @@ class shared_cv final {
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enum : unsigned {
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c_waiter_mask = 0xffff,
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c_signal_mask = 0x7fff0000,
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#ifdef ORBIS_HAS_FUTEX
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c_locked_mask = 0x80000000,
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#endif
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c_signal_one = c_waiter_mask + 1,
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};
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std::atomic<unsigned> m_value{0};
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shared_atomic32 m_value{0};
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protected:
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// Increment waiter count
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unsigned add_waiter() noexcept {
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return atomic_op(m_value, [](unsigned &value) -> unsigned {
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return m_value.op([](unsigned &value) -> unsigned {
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if ((value & c_signal_mask) == c_signal_mask ||
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(value & c_waiter_mask) == c_waiter_mask) {
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// Signal or waiter overflow, return immediately
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@ -34,7 +40,7 @@ protected:
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}
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// Internal waiting function
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int impl_wait(shared_mutex &mutex, unsigned _val,
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std::errc impl_wait(shared_mutex &mutex, unsigned _val,
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std::uint64_t usec_timeout) noexcept;
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// Try to notify up to _count threads
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@ -43,10 +49,25 @@ protected:
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public:
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constexpr shared_cv() = default;
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int wait(shared_mutex &mutex, std::uint64_t usec_timeout = -1) noexcept {
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std::errc
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wait(std::unique_lock<shared_mutex> &lock,
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std::chrono::microseconds timeout = std::chrono::microseconds::max()) {
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return wait(*lock.mutex(), timeout.count());
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}
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template <typename Rep, typename Period>
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std::errc wait(std::unique_lock<shared_mutex> &lock,
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std::chrono::duration<Rep, Period> timeout) {
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return wait(
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lock,
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std::chrono::duration_cast<std::chrono::microseconds>(timeout).count());
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}
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std::errc wait(shared_mutex &mutex,
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std::uint64_t usec_timeout = -1) noexcept {
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const unsigned _val = add_waiter();
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if (!_val) {
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return 0;
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return {};
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}
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mutex.unlock();
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@ -1,8 +1,9 @@
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#pragma once
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#include <atomic>
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#include <mutex>
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#include <orbis/utils/AtomicOp.hpp>
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#include <orbis/utils/SharedAtomic.hpp>
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#include <system_error>
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namespace orbis {
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inline namespace utils {
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@ -16,11 +17,11 @@ class shared_mutex final {
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c_err = 1u << 31,
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};
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std::atomic<unsigned> m_value{};
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shared_atomic32 m_value{};
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void impl_lock_shared(unsigned val);
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void impl_unlock_shared(unsigned old);
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int impl_wait();
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std::errc impl_wait();
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void impl_signal();
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void impl_lock(unsigned val);
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void impl_unlock(unsigned old);
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@ -99,10 +100,10 @@ public:
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}
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// Check whether can immediately obtain an exclusive (writer) lock
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bool is_free() const { return m_value.load() == 0; }
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[[nodiscard]] bool is_free() const { return m_value.load() == 0; }
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// Check whether can immediately obtain a shared (reader) lock
|
||||
bool is_lockable() const { return m_value.load() < c_one - 1; }
|
||||
[[nodiscard]] bool is_lockable() const { return m_value.load() < c_one - 1; }
|
||||
|
||||
private:
|
||||
// For CV
|
||||
|
||||
@ -33,7 +33,7 @@ orbis::ErrorCode orbis::EventFlag::wait(Thread *thread, std::uint8_t waitMode,
|
||||
thread->evfIsCancelled = -1;
|
||||
|
||||
std::unique_lock lock(queueMtx);
|
||||
int result = 0;
|
||||
orbis::ErrorCode result = {};
|
||||
while (true) {
|
||||
if (isDeleted) {
|
||||
if (thread->evfIsCancelled == UINT64_MAX)
|
||||
@ -78,10 +78,10 @@ orbis::ErrorCode orbis::EventFlag::wait(Thread *thread, std::uint8_t waitMode,
|
||||
waitingThreads.emplace_back(waitingThread);
|
||||
|
||||
if (timeout) {
|
||||
result = thread->sync_cv.wait(queueMtx, *timeout);
|
||||
result = toErrorCode(thread->sync_cv.wait(queueMtx, *timeout));
|
||||
update_timeout();
|
||||
} else {
|
||||
result = thread->sync_cv.wait(queueMtx);
|
||||
result = toErrorCode(thread->sync_cv.wait(queueMtx));
|
||||
}
|
||||
|
||||
if (thread->evfIsCancelled == UINT64_MAX) {
|
||||
|
||||
@ -1,9 +1,8 @@
|
||||
#include "umtx.hpp"
|
||||
#include "error.hpp"
|
||||
#include "orbis/KernelContext.hpp"
|
||||
#include "orbis/thread.hpp"
|
||||
#include "orbis/utils/AtomicOp.hpp"
|
||||
#include "orbis/utils/Logs.hpp"
|
||||
#include "time.hpp"
|
||||
#include <limits>
|
||||
|
||||
namespace orbis {
|
||||
@ -57,9 +56,7 @@ uint UmtxChain::notify_n(const UmtxKey &key, sint count) {
|
||||
return n;
|
||||
}
|
||||
|
||||
uint UmtxChain::notify_one(const UmtxKey &key) {
|
||||
return notify_n(key, 1);
|
||||
}
|
||||
uint UmtxChain::notify_one(const UmtxKey &key) { return notify_n(key, 1); }
|
||||
|
||||
uint UmtxChain::notify_all(const UmtxKey &key) {
|
||||
return notify_n(key, std::numeric_limits<sint>::max());
|
||||
@ -94,7 +91,7 @@ orbis::ErrorCode orbis::umtx_wait(Thread *thread, ptr<void> addr, ulong id,
|
||||
if (val == id) {
|
||||
if (ut + 1 == 0) {
|
||||
while (true) {
|
||||
result = ErrorCode{node->second.cv.wait(chain.mtx)};
|
||||
result = orbis::toErrorCode(node->second.cv.wait(chain.mtx));
|
||||
if (result != ErrorCode{} || node->second.thr != thread)
|
||||
break;
|
||||
}
|
||||
@ -102,7 +99,8 @@ orbis::ErrorCode orbis::umtx_wait(Thread *thread, ptr<void> addr, ulong id,
|
||||
auto start = std::chrono::steady_clock::now();
|
||||
std::uint64_t udiff = 0;
|
||||
while (true) {
|
||||
result = ErrorCode{node->second.cv.wait(chain.mtx, ut - udiff)};
|
||||
result =
|
||||
orbis::toErrorCode(node->second.cv.wait(chain.mtx, ut - udiff));
|
||||
if (node->second.thr != thread)
|
||||
break;
|
||||
udiff = std::chrono::duration_cast<std::chrono::microseconds>(
|
||||
@ -193,7 +191,7 @@ static ErrorCode do_lock_normal(Thread *thread, ptr<umutex> m, uint flags,
|
||||
auto [chain, key, lock] = g_context.getUmtxChain1(thread, flags, m);
|
||||
auto node = chain.enqueue(key, thread);
|
||||
if (m->owner.compare_exchange_strong(owner, owner | kUmutexContested)) {
|
||||
error = ErrorCode{node->second.cv.wait(chain.mtx, ut)};
|
||||
error = orbis::toErrorCode(node->second.cv.wait(chain.mtx, ut));
|
||||
if (error == ErrorCode{} && node->second.thr == thread) {
|
||||
error = ErrorCode::TIMEDOUT;
|
||||
}
|
||||
@ -323,7 +321,6 @@ orbis::ErrorCode orbis::umtx_cv_wait(Thread *thread, ptr<ucond> cv,
|
||||
ORBIS_LOG_WARNING("umtx_cv_wait: CLOCK_ID", wflags, cv->clockid);
|
||||
// std::abort();
|
||||
return ErrorCode::NOSYS;
|
||||
|
||||
}
|
||||
if ((wflags & kCvWaitAbsTime) != 0 && ut + 1) {
|
||||
ORBIS_LOG_WARNING("umtx_cv_wait: ABSTIME unimplemented", wflags);
|
||||
@ -353,7 +350,7 @@ orbis::ErrorCode orbis::umtx_cv_wait(Thread *thread, ptr<ucond> cv,
|
||||
if (result == ErrorCode{}) {
|
||||
if (ut + 1 == 0) {
|
||||
while (true) {
|
||||
result = ErrorCode{node->second.cv.wait(chain.mtx, ut)};
|
||||
result = orbis::toErrorCode(node->second.cv.wait(chain.mtx, ut));
|
||||
if (result != ErrorCode{} || node->second.thr != thread) {
|
||||
break;
|
||||
}
|
||||
@ -362,7 +359,8 @@ orbis::ErrorCode orbis::umtx_cv_wait(Thread *thread, ptr<ucond> cv,
|
||||
auto start = std::chrono::steady_clock::now();
|
||||
std::uint64_t udiff = 0;
|
||||
while (true) {
|
||||
result = ErrorCode{node->second.cv.wait(chain.mtx, ut - udiff)};
|
||||
result =
|
||||
orbis::toErrorCode(node->second.cv.wait(chain.mtx, ut - udiff));
|
||||
if (node->second.thr != thread) {
|
||||
break;
|
||||
}
|
||||
@ -457,7 +455,7 @@ orbis::ErrorCode orbis::umtx_rw_rdlock(Thread *thread, ptr<urwlock> rwlock,
|
||||
|
||||
if (ut + 1 == 0) {
|
||||
while (true) {
|
||||
result = ErrorCode{node->second.cv.wait(chain.mtx, ut)};
|
||||
result = orbis::toErrorCode(node->second.cv.wait(chain.mtx, ut));
|
||||
if (result != ErrorCode{} || node->second.thr != thread) {
|
||||
break;
|
||||
}
|
||||
@ -466,7 +464,8 @@ orbis::ErrorCode orbis::umtx_rw_rdlock(Thread *thread, ptr<urwlock> rwlock,
|
||||
auto start = std::chrono::steady_clock::now();
|
||||
std::uint64_t udiff = 0;
|
||||
while (true) {
|
||||
result = ErrorCode{node->second.cv.wait(chain.mtx, ut - udiff)};
|
||||
result =
|
||||
orbis::toErrorCode(node->second.cv.wait(chain.mtx, ut - udiff));
|
||||
if (node->second.thr != thread)
|
||||
break;
|
||||
udiff = std::chrono::duration_cast<std::chrono::microseconds>(
|
||||
@ -557,7 +556,7 @@ orbis::ErrorCode orbis::umtx_rw_wrlock(Thread *thread, ptr<urwlock> rwlock,
|
||||
|
||||
if (ut + 1 == 0) {
|
||||
while (true) {
|
||||
error = ErrorCode{node->second.cv.wait(chain.mtx, ut)};
|
||||
error = orbis::toErrorCode(node->second.cv.wait(chain.mtx, ut));
|
||||
if (error != ErrorCode{} || node->second.thr != thread) {
|
||||
break;
|
||||
}
|
||||
@ -566,7 +565,8 @@ orbis::ErrorCode orbis::umtx_rw_wrlock(Thread *thread, ptr<urwlock> rwlock,
|
||||
auto start = std::chrono::steady_clock::now();
|
||||
std::uint64_t udiff = 0;
|
||||
while (true) {
|
||||
error = ErrorCode{node->second.cv.wait(chain.mtx, ut - udiff)};
|
||||
error =
|
||||
orbis::toErrorCode(node->second.cv.wait(chain.mtx, ut - udiff));
|
||||
if (node->second.thr != thread)
|
||||
break;
|
||||
udiff = std::chrono::duration_cast<std::chrono::microseconds>(
|
||||
@ -729,7 +729,7 @@ orbis::ErrorCode orbis::umtx_sem_wait(Thread *thread, ptr<usem> sem,
|
||||
if (!sem->count) {
|
||||
if (ut + 1 == 0) {
|
||||
while (true) {
|
||||
result = ErrorCode{node->second.cv.wait(chain.mtx, ut)};
|
||||
result = orbis::toErrorCode(node->second.cv.wait(chain.mtx, ut));
|
||||
if (result != ErrorCode{} || node->second.thr != thread)
|
||||
break;
|
||||
}
|
||||
@ -737,7 +737,8 @@ orbis::ErrorCode orbis::umtx_sem_wait(Thread *thread, ptr<usem> sem,
|
||||
auto start = std::chrono::steady_clock::now();
|
||||
std::uint64_t udiff = 0;
|
||||
while (true) {
|
||||
result = ErrorCode{node->second.cv.wait(chain.mtx, ut - udiff)};
|
||||
result =
|
||||
orbis::toErrorCode(node->second.cv.wait(chain.mtx, ut - udiff));
|
||||
if (node->second.thr != thread)
|
||||
break;
|
||||
udiff = std::chrono::duration_cast<std::chrono::microseconds>(
|
||||
|
||||
95
orbis-kernel/src/utils/SharedAtomic.cpp
Normal file
95
orbis-kernel/src/utils/SharedAtomic.cpp
Normal file
@ -0,0 +1,95 @@
|
||||
#include "utils/SharedAtomic.hpp"
|
||||
using namespace orbis;
|
||||
|
||||
#ifdef ORBIS_HAS_FUTEX
|
||||
#include <linux/futex.h>
|
||||
|
||||
std::errc shared_atomic32::wait_impl(std::uint32_t oldValue,
|
||||
std::chrono::microseconds usec_timeout) {
|
||||
auto usec_timeout_count = usec_timeout.count();
|
||||
struct timespec timeout{};
|
||||
timeout.tv_nsec = (usec_timeout_count % 1000'000) * 1000;
|
||||
timeout.tv_sec = (usec_timeout_count / 1000'000);
|
||||
|
||||
int result = syscall(
|
||||
SYS_futex, this, FUTEX_WAIT, oldValue,
|
||||
usec_timeout != std::chrono::microseconds::max() ? &timeout : nullptr, 0,
|
||||
0);
|
||||
|
||||
if (result < 0) {
|
||||
return static_cast<std::errc>(errno);
|
||||
}
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
int shared_atomic32::notify_n(int count) const {
|
||||
return syscall(SYS_futex, this, FUTEX_WAKE, count);
|
||||
}
|
||||
#elif defined(ORBIS_HAS_ULOCK)
|
||||
#include <limits>
|
||||
|
||||
#define UL_COMPARE_AND_WAIT 1
|
||||
#define UL_UNFAIR_LOCK 2
|
||||
#define UL_COMPARE_AND_WAIT_SHARED 3
|
||||
#define UL_UNFAIR_LOCK64_SHARED 4
|
||||
#define UL_COMPARE_AND_WAIT64 5
|
||||
#define UL_COMPARE_AND_WAIT64_SHARED 6
|
||||
|
||||
#define ULF_WAKE_ALL 0x00000100
|
||||
#define ULF_WAKE_THREAD 0x00000200
|
||||
#define ULF_WAKE_ALLOW_NON_OWNER 0x00000400
|
||||
|
||||
#define ULF_WAIT_WORKQ_DATA_CONTENTION 0x00010000
|
||||
#define ULF_WAIT_CANCEL_POINT 0x00020000
|
||||
#define ULF_WAIT_ADAPTIVE_SPIN 0x00040000
|
||||
|
||||
#define ULF_NO_ERRNO 0x01000000
|
||||
|
||||
#define UL_OPCODE_MASK 0x000000FF
|
||||
#define UL_FLAGS_MASK 0xFFFFFF00
|
||||
#define ULF_GENERIC_MASK 0xFFFF0000
|
||||
|
||||
extern int __ulock_wait(uint32_t operation, void *addr, uint64_t value,
|
||||
uint32_t timeout);
|
||||
extern int __ulock_wake(uint32_t operation, void *addr, uint64_t wake_value);
|
||||
|
||||
std::errc shared_atomic32::wait_impl(std::uint32_t oldValue,
|
||||
std::chrono::microseconds usec_timeout) {
|
||||
int result = __ulock_wait(UL_COMPARE_AND_WAIT_SHARED, (void *)this, oldValue,
|
||||
usec_timeout.count());
|
||||
|
||||
if (result < 0) {
|
||||
return static_cast<std::errc>(errno);
|
||||
}
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
int shared_atomic32::notify_n(int count) const {
|
||||
int result = 0;
|
||||
uint32_t operation = UL_COMPARE_AND_WAIT_SHARED | ULF_NO_ERRNO;
|
||||
if (count == 1) {
|
||||
result = __ulock_wake(operation, (void *)this, 0);
|
||||
} else if (count == std::numeric_limits<int>::max()) {
|
||||
result = __ulock_wake(ULF_WAKE_ALL | operation, (void *)this, 0);
|
||||
} else {
|
||||
for (int i = 0; i < count; ++i) {
|
||||
auto ret = __ulock_wake(operation, (void *)this, 0);
|
||||
if (ret != 0) {
|
||||
if (result == 0) {
|
||||
result = ret;
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
result++;
|
||||
}
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
#else
|
||||
#error Unimplemented atomic for this platform
|
||||
#endif
|
||||
@ -1,35 +1,30 @@
|
||||
#include "orbis/utils/SharedCV.hpp"
|
||||
#include "orbis/utils/Logs.hpp"
|
||||
#include <chrono>
|
||||
|
||||
#ifdef ORBIS_HAS_FUTEX
|
||||
#include <linux/futex.h>
|
||||
#include <syscall.h>
|
||||
#include <unistd.h>
|
||||
#endif
|
||||
|
||||
namespace orbis::utils {
|
||||
int shared_cv::impl_wait(shared_mutex &mutex, unsigned _val,
|
||||
std::errc shared_cv::impl_wait(shared_mutex &mutex, unsigned _val,
|
||||
std::uint64_t usec_timeout) noexcept {
|
||||
// Not supposed to fail
|
||||
if (!_val) {
|
||||
std::abort();
|
||||
}
|
||||
|
||||
// Wait with timeout
|
||||
struct timespec timeout {};
|
||||
timeout.tv_nsec = (usec_timeout % 1000'000) * 1000;
|
||||
timeout.tv_sec = (usec_timeout / 1000'000);
|
||||
|
||||
int result = 0;
|
||||
std::errc result = {};
|
||||
|
||||
while (true) {
|
||||
result = syscall(SYS_futex, &m_value, FUTEX_WAIT, _val,
|
||||
usec_timeout + 1 ? &timeout : nullptr, 0, 0);
|
||||
if (result < 0) {
|
||||
result = errno;
|
||||
}
|
||||
result = m_value.wait(_val, std::chrono::microseconds(usec_timeout));
|
||||
|
||||
// Cleanup
|
||||
const auto old = atomic_fetch_op(m_value, [&](unsigned &value) {
|
||||
const auto old = m_value.fetch_op([&](unsigned &value) {
|
||||
// Remove waiter if no signals
|
||||
if (!(value & ~c_waiter_mask) && result != EAGAIN) {
|
||||
if (!(value & ~c_waiter_mask) &&
|
||||
result != std::errc::resource_unavailable_try_again) {
|
||||
value -= 1;
|
||||
}
|
||||
|
||||
@ -38,23 +33,32 @@ int shared_cv::impl_wait(shared_mutex &mutex, unsigned _val,
|
||||
value -= c_signal_one;
|
||||
}
|
||||
|
||||
#ifdef ORBIS_HAS_FUTEX
|
||||
if (value & c_locked_mask) {
|
||||
value -= c_locked_mask;
|
||||
}
|
||||
#endif
|
||||
});
|
||||
|
||||
#ifdef ORBIS_HAS_FUTEX
|
||||
// Lock is already acquired
|
||||
if (old & c_locked_mask) {
|
||||
return 0;
|
||||
return {};
|
||||
}
|
||||
|
||||
// Wait directly (waiter has been added)
|
||||
if (old & c_signal_mask) {
|
||||
return mutex.impl_wait();
|
||||
}
|
||||
#else
|
||||
if (old & c_signal_mask) {
|
||||
result = {};
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
|
||||
// Possibly spurious wakeup
|
||||
if (result != EAGAIN) {
|
||||
if (result != std::errc::resource_unavailable_try_again) {
|
||||
break;
|
||||
}
|
||||
|
||||
@ -66,6 +70,8 @@ int shared_cv::impl_wait(shared_mutex &mutex, unsigned _val,
|
||||
}
|
||||
|
||||
void shared_cv::impl_wake(shared_mutex &mutex, int _count) noexcept {
|
||||
#ifdef ORBIS_HAS_FUTEX
|
||||
while (true) {
|
||||
unsigned _old = m_value.load();
|
||||
const bool is_one = _count == 1;
|
||||
|
||||
@ -77,7 +83,7 @@ void shared_cv::impl_wake(shared_mutex &mutex, int _count) noexcept {
|
||||
// Try to lock the mutex
|
||||
const bool locked = mutex.lock_forced(_count);
|
||||
|
||||
const int max_sig = atomic_op(m_value, [&](unsigned &value) {
|
||||
const int max_sig = m_value.op([&](unsigned &value) {
|
||||
// Verify the number of waiters
|
||||
int max_sig = std::min<int>(_count, value & c_waiter_mask);
|
||||
|
||||
@ -109,8 +115,38 @@ void shared_cv::impl_wake(shared_mutex &mutex, int _count) noexcept {
|
||||
_count - awake_count, &mutex, 0);
|
||||
r < _count) {
|
||||
// Keep awaking waiters
|
||||
return impl_wake(mutex, is_one ? 1 : INT_MAX);
|
||||
_count = is_one ? 1 : INT_MAX;
|
||||
continue;
|
||||
}
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
#else
|
||||
unsigned _old = m_value.load();
|
||||
_count = std::min<int>(_count, _old & c_waiter_mask);
|
||||
if (_count <= 0)
|
||||
return;
|
||||
|
||||
mutex.lock_forced(1);
|
||||
|
||||
const int wakeupWaiters = m_value.op([&](unsigned &value) {
|
||||
int max_sig = std::min<int>(_count, value & c_waiter_mask);
|
||||
|
||||
// Add normal signals
|
||||
value += c_signal_one * max_sig;
|
||||
|
||||
// Remove waiters
|
||||
value -= max_sig;
|
||||
_old = value;
|
||||
return max_sig;
|
||||
});
|
||||
|
||||
if (wakeupWaiters > 0) {
|
||||
m_value.notify_n(wakeupWaiters);
|
||||
}
|
||||
|
||||
mutex.unlock();
|
||||
#endif
|
||||
}
|
||||
} // namespace orbis::utils
|
||||
|
||||
@ -1,6 +1,5 @@
|
||||
#include "utils/SharedMutex.hpp"
|
||||
#include "utils/Logs.hpp"
|
||||
#include <linux/futex.h>
|
||||
#include <syscall.h>
|
||||
#include <unistd.h>
|
||||
#include <xmmintrin.h>
|
||||
@ -48,7 +47,7 @@ void shared_mutex::impl_lock_shared(unsigned val) {
|
||||
if ((old % c_sig) + c_one >= c_sig)
|
||||
std::abort(); // "shared_mutex overflow"
|
||||
|
||||
while (impl_wait() != 0) {}
|
||||
while (impl_wait() != std::errc{}) {}
|
||||
lock_downgrade();
|
||||
}
|
||||
void shared_mutex::impl_unlock_shared(unsigned old) {
|
||||
@ -60,9 +59,9 @@ void shared_mutex::impl_unlock_shared(unsigned old) {
|
||||
impl_signal();
|
||||
}
|
||||
}
|
||||
int shared_mutex::impl_wait() {
|
||||
std::errc shared_mutex::impl_wait() {
|
||||
while (true) {
|
||||
const auto [old, ok] = atomic_fetch_op(m_value, [](unsigned &value) {
|
||||
const auto [old, ok] = m_value.fetch_op([](unsigned &value) {
|
||||
if (value >= c_sig) {
|
||||
value -= c_sig;
|
||||
return true;
|
||||
@ -75,19 +74,17 @@ int shared_mutex::impl_wait() {
|
||||
break;
|
||||
}
|
||||
|
||||
int result = syscall(SYS_futex, &m_value, FUTEX_WAIT, old, 0, 0, 0);
|
||||
if (result < 0) {
|
||||
result = errno;
|
||||
}
|
||||
if (result == EINTR) {
|
||||
return EINTR;
|
||||
auto result = m_value.wait(old);
|
||||
if (result == std::errc::interrupted) {
|
||||
return result;
|
||||
}
|
||||
}
|
||||
|
||||
return{};
|
||||
}
|
||||
void shared_mutex::impl_signal() {
|
||||
m_value += c_sig;
|
||||
syscall(SYS_futex, &m_value, FUTEX_WAKE, 1, 0, 0, 0);
|
||||
m_value.notify_one();
|
||||
}
|
||||
void shared_mutex::impl_lock(unsigned val) {
|
||||
if (val >= c_err)
|
||||
@ -123,7 +120,7 @@ void shared_mutex::impl_lock(unsigned val) {
|
||||
|
||||
if ((old % c_sig) + c_one >= c_sig)
|
||||
std::abort(); // "shared_mutex overflow"
|
||||
while (impl_wait() != 0) {}
|
||||
while (impl_wait() != std::errc{}) {}
|
||||
}
|
||||
void shared_mutex::impl_unlock(unsigned old) {
|
||||
if (old - c_one >= c_err)
|
||||
@ -155,27 +152,23 @@ void shared_mutex::impl_lock_upgrade() {
|
||||
return;
|
||||
}
|
||||
|
||||
while (impl_wait() != 0) {}
|
||||
while (impl_wait() != std::errc{}) {}
|
||||
}
|
||||
bool shared_mutex::lock_forced(int count) {
|
||||
if (count == 0)
|
||||
return false;
|
||||
if (count > 0) {
|
||||
// Lock
|
||||
return atomic_op(m_value, [&](unsigned &v) {
|
||||
return m_value.op([&](std::uint32_t &v) {
|
||||
if (v & c_sig) {
|
||||
v -= c_sig;
|
||||
v += c_one * count;
|
||||
return true;
|
||||
}
|
||||
|
||||
if (v == 0) {
|
||||
bool firstLock = v == 0;
|
||||
v += c_one * count;
|
||||
return true;
|
||||
}
|
||||
|
||||
v += c_one * count;
|
||||
return false;
|
||||
return firstLock;
|
||||
});
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user