ppsspp/Core/Instance.cpp
Jan Beich 901c3c53de Instance: add missing headers more POSIX systems
Core/Instance.cpp:90:56: error: use of undeclared identifier 'PROT_READ'
        InstanceInfo *buf = (InstanceInfo *)mmap(0, BUF_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, hIDMapFile, 0);
                                                              ^
Core/Instance.cpp:90:68: error: use of undeclared identifier 'PROT_WRITE'
        InstanceInfo *buf = (InstanceInfo *)mmap(0, BUF_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, hIDMapFile, 0);
                                                                          ^
Core/Instance.cpp:90:80: error: use of undeclared identifier 'MAP_SHARED'
        InstanceInfo *buf = (InstanceInfo *)mmap(0, BUF_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, hIDMapFile, 0);
                                                                                      ^
Core/Instance.cpp:91:13: error: use of undeclared identifier 'MAP_FAILED'
        if (buf == MAP_FAILED) {
                   ^
Core/Instance.cpp:147:37: error: use of undeclared identifier 'O_CREAT'
        hIDMapFile = shm_open(ID_SHM_NAME, O_CREAT | O_RDWR, 0);
                                           ^
Core/Instance.cpp:147:47: error: use of undeclared identifier 'O_RDWR'
        hIDMapFile = shm_open(ID_SHM_NAME, O_CREAT | O_RDWR, 0);
                                                     ^
Core/Instance.cpp:185:3: error: use of undeclared identifier 'shm_unlink'
                shm_unlink(ID_SHM_NAME);     // If program exited or crashed before unlinked the shared memory object and it's contents will persist.
                ^
2020-12-27 05:25:05 +00:00

190 lines
4.9 KiB
C++

// Copyright (c) 2020 PPSSPP Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
#include "Instance.h"
#if !PPSSPP_PLATFORM(WINDOWS) && !PPSSPP_PLATFORM(ANDROID) && !defined(__LIBRETRO__)
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <fcntl.h>
#endif
#include "Common/Log.h"
#if PPSSPP_PLATFORM(WINDOWS)
#include "Common/CommonWindows.h"
#endif
#include <cstdint>
uint8_t PPSSPP_ID = 0;
#if PPSSPP_PLATFORM(WINDOWS)
static HANDLE hIDMapFile = nullptr;
static HANDLE mapLock = nullptr;
#else
static int hIDMapFile = -1;
static long BUF_SIZE = 4096;
#endif
struct InstanceInfo {
uint8_t pad[2];
uint8_t next;
uint8_t total;
};
#define ID_SHM_NAME "/PPSSPP_ID"
static bool UpdateInstanceCounter(void (*callback)(volatile InstanceInfo *)) {
#if PPSSPP_PLATFORM(WINDOWS)
if (!hIDMapFile) {
return false;
}
InstanceInfo *buf = (InstanceInfo *)MapViewOfFile(hIDMapFile, // handle to map object
FILE_MAP_ALL_ACCESS, // read/write permission
0,
0,
sizeof(InstanceInfo));
if (!buf) {
ERROR_LOG(SCENET, "Could not map view of file %s (%d).", ID_SHM_NAME, GetLastError());
return false;
}
bool result = false;
if (!mapLock || WaitForSingleObject(mapLock, INFINITE) == 0) {
callback(buf);
if (mapLock) {
ReleaseMutex(mapLock);
}
result = true;
}
UnmapViewOfFile(buf);
return result;
#elif PPSSPP_PLATFORM(ANDROID) || defined(__LIBRETRO__)
// TODO: replace shm_open & shm_unlink with ashmem or android-shmem
return false;
#else
if (hIDMapFile < 0) {
return false;
}
InstanceInfo *buf = (InstanceInfo *)mmap(0, BUF_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, hIDMapFile, 0);
if (buf == MAP_FAILED) {
ERROR_LOG(SCENET, "mmap(%s) failure.", ID_SHM_NAME);
return false;
}
bool result = false;
if (mlock(buf, BUF_SIZE) == 0) {
callback(buf);
munlock(buf, BUF_SIZE);
result = true;
}
munmap(buf, BUF_SIZE);
return result;
#endif
}
int GetInstancePeerCount() {
static int c = 0;
UpdateInstanceCounter([](volatile InstanceInfo *buf) {
c = buf->total;
});
return c;
}
// Get current number of instance of PPSSPP running.
// Must be called only once during init.
void InitInstanceCounter() {
#if PPSSPP_PLATFORM(WINDOWS)
uint32_t BUF_SIZE = 4096;
SYSTEM_INFO sysInfo;
GetSystemInfo(&sysInfo);
int gran = sysInfo.dwAllocationGranularity ? sysInfo.dwAllocationGranularity : 0x10000;
BUF_SIZE = (BUF_SIZE + gran - 1) & ~(gran - 1);
mapLock = CreateMutex(nullptr, FALSE, L"PPSSPP_ID_mutex");
hIDMapFile = CreateFileMapping(
INVALID_HANDLE_VALUE, // use paging file
NULL, // default security
PAGE_READWRITE, // read/write access
0, // maximum object size (high-order DWORD)
BUF_SIZE, // maximum object size (low-order DWORD)
TEXT(ID_SHM_NAME)); // name of mapping object
DWORD lasterr = GetLastError();
if (!hIDMapFile) {
ERROR_LOG(SCENET, "Could not create %s file mapping object (%d).", ID_SHM_NAME, lasterr);
PPSSPP_ID = 1;
return;
}
#elif PPSSPP_PLATFORM(ANDROID) || defined(__LIBRETRO__)
// TODO : replace shm_open & shm_unlink with ashmem or android-shmem
#else
// Create shared memory object
hIDMapFile = shm_open(ID_SHM_NAME, O_CREAT | O_RDWR, 0);
BUF_SIZE = (BUF_SIZE < sysconf(_SC_PAGE_SIZE)) ? sysconf(_SC_PAGE_SIZE) : BUF_SIZE;
if (hIDMapFile < 0 || (ftruncate(hIDMapFile, BUF_SIZE)) == -1) { // Set the size
ERROR_LOG(SCENET, "ftruncate(%s) failure.", ID_SHM_NAME);
PPSSPP_ID = 1;
return;
}
#endif
bool success = UpdateInstanceCounter([](volatile InstanceInfo *buf) {
PPSSPP_ID = ++buf->next;
buf->total++;
});
if (!success) {
PPSSPP_ID = 1;
}
}
void ShutdownInstanceCounter() {
UpdateInstanceCounter([](volatile InstanceInfo *buf) {
buf->total--;
});
#if PPSSPP_PLATFORM(WINDOWS)
if (hIDMapFile) {
CloseHandle(hIDMapFile); // If program exited(or crashed?) or the last handle reference closed the shared memory object will be deleted.
hIDMapFile = nullptr;
}
if (mapLock) {
CloseHandle(mapLock);
mapLock = nullptr;
}
#elif PPSSPP_PLATFORM(ANDROID) || defined(__LIBRETRO__)
// Do nothing
#else
if (hIDMapFile >= 0) {
close(hIDMapFile);
shm_unlink(ID_SHM_NAME); // If program exited or crashed before unlinked the shared memory object and it's contents will persist.
hIDMapFile = -1;
}
#endif
}