#include "llvm/Config/config.h"
#include "llvm/System/Mutex.h"
#if !defined(ENABLE_THREADS) || ENABLE_THREADS == 0
namespace llvm {
using namespace sys;
Mutex::Mutex( bool recursive) { }
Mutex::~Mutex() { }
bool Mutex::acquire() { return true; }
bool Mutex::release() { return true; }
bool Mutex::tryacquire() { return true; }
}
#else
#if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_MUTEX_LOCK)
#include <cassert>
#include <pthread.h>
#include <stdlib.h>
namespace llvm {
using namespace sys;
static const bool pthread_enabled = true;
Mutex::Mutex( bool recursive)
: data_(0)
{
if (pthread_enabled)
{
pthread_mutex_t* mutex =
static_cast<pthread_mutex_t*>(malloc(sizeof(pthread_mutex_t)));
pthread_mutexattr_t attr;
int errorcode = pthread_mutexattr_init(&attr);
assert(errorcode == 0);
int kind = ( recursive ? PTHREAD_MUTEX_RECURSIVE : PTHREAD_MUTEX_NORMAL );
errorcode = pthread_mutexattr_settype(&attr, kind);
assert(errorcode == 0);
#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__DragonFly__)
errorcode = pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_PRIVATE);
#endif
errorcode = pthread_mutex_init(mutex, &attr);
assert(errorcode == 0);
errorcode = pthread_mutexattr_destroy(&attr);
assert(errorcode == 0);
data_ = mutex;
}
}
Mutex::~Mutex()
{
if (pthread_enabled)
{
pthread_mutex_t* mutex = static_cast<pthread_mutex_t*>(data_);
assert(mutex != 0);
pthread_mutex_destroy(mutex);
free(mutex);
}
}
bool
Mutex::acquire()
{
if (pthread_enabled)
{
pthread_mutex_t* mutex = static_cast<pthread_mutex_t*>(data_);
assert(mutex != 0);
int errorcode = pthread_mutex_lock(mutex);
return errorcode == 0;
}
return false;
}
bool
Mutex::release()
{
if (pthread_enabled)
{
pthread_mutex_t* mutex = static_cast<pthread_mutex_t*>(data_);
assert(mutex != 0);
int errorcode = pthread_mutex_unlock(mutex);
return errorcode == 0;
}
return false;
}
bool
Mutex::tryacquire()
{
if (pthread_enabled)
{
pthread_mutex_t* mutex = static_cast<pthread_mutex_t*>(data_);
assert(mutex != 0);
int errorcode = pthread_mutex_trylock(mutex);
return errorcode == 0;
}
return false;
}
}
#elif defined(LLVM_ON_UNIX)
#include "Unix/Mutex.inc"
#elif defined( LLVM_ON_WIN32)
#include "Win32/Mutex.inc"
#else
#warning Neither LLVM_ON_UNIX nor LLVM_ON_WIN32 was set in System/Mutex.cpp
#endif
#endif