DirectXShaderCompiler/lib/Support/Unix/ThreadLocal.inc at main · microsoft/DirectXShaderCompiler · GitHub

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//=== llvm/Support/Unix/ThreadLocal.inc - Unix Thread Local Data -*- C++ -*-===//

// The LLVM Compiler Infrastructure

// This file is distributed under the University of Illinois Open Source

// License. See LICENSE.TXT for details.

//===----------------------------------------------------------------------===//

// This file implements the Unix specific (non-pthread) ThreadLocal class.

//===----------------------------------------------------------------------===//

//=== WARNING: Implementation here must contain only generic UNIX code that

//=== is guaranteed to work on *all* UNIX variants.

//===----------------------------------------------------------------------===//

#if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_GETSPECIFIC)

#include <cassert>

#include <pthread.h>

#include <stdlib.h>

namespace llvm {

using namespace sys;

ThreadLocalImpl::ThreadLocalImpl() : data() {

static_assert(sizeof(pthread_key_t) <= sizeof(data), "size too big");

pthread_key_t* key = reinterpret_cast<pthread_key_t*>(&data);

int errorcode = pthread_key_create(key, nullptr);

assert(errorcode == 0);

(void) errorcode;

}

ThreadLocalImpl::~ThreadLocalImpl() {

pthread_key_t* key = reinterpret_cast<pthread_key_t*>(&data);

int errorcode = pthread_key_delete(*key);

assert(errorcode == 0);

(void) errorcode;

}

void ThreadLocalImpl::setInstance(const void* d) {

pthread_key_t* key = reinterpret_cast<pthread_key_t*>(&data);

int errorcode = pthread_setspecific(*key, d);

assert(errorcode == 0);

(void) errorcode;

}

void *ThreadLocalImpl::getInstance() {

pthread_key_t* key = reinterpret_cast<pthread_key_t*>(&data);

return pthread_getspecific(*key);

}

void ThreadLocalImpl::removeInstance() {

setInstance(nullptr);

}

#else

namespace llvm {

using namespace sys;

ThreadLocalImpl::ThreadLocalImpl() : data() { }

ThreadLocalImpl::~ThreadLocalImpl() { }

void ThreadLocalImpl::setInstance(const void* d) { data = const_cast<void*>(d);}

void *ThreadLocalImpl::getInstance() { return data; }

void ThreadLocalImpl::removeInstance() { setInstance(0); }

}

#endif

DirectXShaderCompiler/lib/Support/Unix/ThreadLocal.inc at main · microsoft/DirectXShaderCompiler · GitHub

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