bool
Thread::Start()
{
assert(!IsDefined());
#ifdef HAVE_POSIX
#ifndef NDEBUG
creating = true;
#endif
defined = pthread_create(&handle, NULL, ThreadProc, this) == 0;
#ifndef NDEBUG
creating = false;
#endif
bool success = defined;
#else
handle = ::CreateThread(NULL, 0, ThreadProc, this, 0, &id);
bool success = handle != NULL;
#endif
#ifndef NDEBUG
if (success) {
all_threads_mutex.Lock();
siblings.InsertAfter(all_threads);
all_threads_mutex.Unlock();
}
#endif
return success;
}
/**
* Determine if the current thread has locked this mutex. This is a
* debug-only method meant for assert() calls, and is not available
* in optimised builds.
*/
gcc_pure
bool IsLockedByCurrent() const {
debug_mutex.Lock();
bool result = locked && owner.IsInside();
debug_mutex.Unlock();
return result;
}
bool
Thread::Start()
{
assert(!IsDefined());
#ifdef HAVE_POSIX
#ifndef NDEBUG
creating = true;
#endif
defined = pthread_create(&handle, nullptr, ThreadProc, this) == 0;
#ifndef NDEBUG
creating = false;
#endif
bool success = defined;
#else
handle = ::CreateThread(nullptr, 0, ThreadProc, this, 0, &id);
bool success = handle != nullptr;
#endif
#ifndef NDEBUG
if (success) {
all_threads_mutex.Lock();
all_threads.push_back(*this);
all_threads_mutex.Unlock();
}
#endif
return success;
}
bool
ExistsAnyThread()
{
all_threads_mutex.Lock();
bool result = !all_threads.IsEmpty();
all_threads_mutex.Unlock();
return result;
}
/**
* Locks the Mutex
*/
void Lock() {
#ifdef NDEBUG
mutex.Lock();
#else
if (!mutex.TryLock()) {
/* locking has failed - at this point, "locked" and "owner" are
either not yet update, or "owner" is set to another thread */
assert(!IsLockedByCurrent());
mutex.Lock();
}
/* we have just obtained the mutex; the "locked" flag must not be
set */
debug_mutex.Lock();
assert(!locked);
locked = true;
owner = ThreadHandle::GetCurrent();
debug_mutex.Unlock();
++thread_locks_held;
#endif
};
/**
* Unlocks the Mutex
*/
void Unlock() {
#ifndef NDEBUG
debug_mutex.Lock();
assert(locked);
assert(owner.IsInside());
locked = false;
debug_mutex.Unlock();
#endif
mutex.Unlock();
#ifndef NDEBUG
--thread_locks_held;
#endif
}
/**
* Tries to lock the Mutex
*/
bool TryLock() {
if (!mutex.TryLock()) {
#ifndef NDEBUG
assert(!IsLockedByCurrent());
#endif
return false;
}
#ifndef NDEBUG
debug_mutex.Lock();
assert(!locked);
locked = true;
owner = ThreadHandle::GetCurrent();
debug_mutex.Unlock();
++thread_locks_held;
#endif
return true;
};
void
Thread::Join()
{
assert(IsDefined());
assert(!IsInside());
#ifdef HAVE_POSIX
pthread_join(handle, NULL);
defined = false;
#else
::WaitForSingleObject(handle, INFINITE);
::CloseHandle(handle);
handle = NULL;
#endif
#ifndef NDEBUG
all_threads_mutex.Lock();
siblings.Remove();
all_threads_mutex.Unlock();
#endif
}
void
Thread::Join()
{
assert(IsDefined());
assert(!IsInside());
#ifdef HAVE_POSIX
pthread_join(handle, nullptr);
defined = false;
#else
::WaitForSingleObject(handle, INFINITE);
::CloseHandle(handle);
handle = nullptr;
#endif
#ifndef NDEBUG
all_threads_mutex.Lock();
all_threads.erase(all_threads.iterator_to(*this));
all_threads_mutex.Unlock();
#endif
}
bool
Thread::Join(unsigned timeout_ms)
{
assert(IsDefined());
assert(!IsInside());
bool result = ::WaitForSingleObject(handle, timeout_ms) == WAIT_OBJECT_0;
if (result) {
::CloseHandle(handle);
handle = NULL;
#ifndef NDEBUG
{
all_threads_mutex.Lock();
siblings.Remove();
all_threads_mutex.Unlock();
}
#endif
}
return result;
}
bool
Thread::Join(unsigned timeout_ms)
{
assert(IsDefined());
assert(!IsInside());
bool result = ::WaitForSingleObject(handle, timeout_ms) == WAIT_OBJECT_0;
if (result) {
::CloseHandle(handle);
handle = nullptr;
#ifndef NDEBUG
{
all_threads_mutex.Lock();
all_threads.erase(all_threads.iterator_to(*this));
all_threads_mutex.Unlock();
}
#endif
}
return result;
}
