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13b537a99b
Implement the old API in terms of the new one. This simplifies the implementation on Windows which can now re-use the self_process's once initialization. llvm-svn: 171330
73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
//===-- Process.cpp - Implement OS Process Concept --------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This header file implements the operating system Process concept.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Config/config.h"
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#include "llvm/Support/Process.h"
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#include "llvm/Support/ErrorHandling.h"
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using namespace llvm;
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using namespace sys;
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only TRULY operating system
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//=== independent code.
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//===----------------------------------------------------------------------===//
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// Empty virtual destructor to anchor the vtable for the process class.
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process::~process() {}
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self_process *process::get_self() {
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// Use a function local static for thread safe initialization and allocate it
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// as a raw pointer to ensure it is never destroyed.
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static self_process *SP = new self_process();
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return SP;
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}
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#if defined(_MSC_VER)
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// Visual Studio complains that the self_process destructor never exits. This
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// doesn't make much sense, as that's the whole point of calling abort... Just
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// silence this warning.
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#pragma warning(push)
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#pragma warning(disable:4722)
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#endif
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// The destructor for the self_process subclass must never actually be
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// executed. There should be at most one instance of this class, and that
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// instance should live until the process terminates to avoid the potential for
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// racy accesses during shutdown.
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self_process::~self_process() {
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llvm_unreachable("This destructor must never be executed!");
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}
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#if defined(_MSC_VER)
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#pragma warning(pop)
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#endif
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//===----------------------------------------------------------------------===//
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// Implementations of legacy functions in terms of the new self_process object.
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unsigned Process::GetPageSize() {
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return process::get_self()->page_size();
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}
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// Include the platform-specific parts of this class.
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#ifdef LLVM_ON_UNIX
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#include "Unix/Process.inc"
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#endif
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#ifdef LLVM_ON_WIN32
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#include "Windows/Process.inc"
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#endif
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