Fixed some bugs in idSysSignal.

This commit is contained in:
Robert Beckebans 2012-12-12 11:29:55 +01:00
parent 47f3f1b999
commit baac8780a5
3 changed files with 131 additions and 118 deletions

View file

@ -138,127 +138,17 @@ class idSysSignal
public:
static const int WAIT_INFINITE = -1;
idSysSignal( bool manualReset = false )
{
pthread_mutexattr_t attr;
idSysSignal( bool manualReset = false );
~idSysSignal();
pthread_mutexattr_init( &attr );
pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
pthread_mutex_init( &mutex, &attr );
pthread_mutexattr_destroy( &attr );
void Raise();
pthread_cond_init( &cond, NULL );
signaled = false;
waiting = false;
}
~idSysSignal()
{
pthread_cond_destroy( &cond );
}
void Raise()
{
pthread_mutex_lock( &mutex );
if( waiting )
{
pthread_cond_signal( &cond );
}
else
{
// emulate Windows behaviour: if no thread is waiting, leave the signal on so next wait keeps going
signaled = true;
}
pthread_mutex_unlock( &mutex );
}
void Clear()
{
pthread_mutex_lock( &mutex );
signaled = false;
pthread_mutex_unlock( &mutex );
}
void Clear();
// Wait returns true if the object is in a signalled state and
// returns false if the wait timed out. Wait also clears the signalled
// state when the signalled state is reached within the time out period.
bool Wait( int timeout = WAIT_INFINITE )
{
pthread_mutex_lock( &mutex );
//DWORD result = WaitForSingleObject( handle, timeout == idSysSignal::WAIT_INFINITE ? INFINITE : timeout );
//assert( result == WAIT_OBJECT_0 || ( timeout != idSysSignal::WAIT_INFINITE && result == WAIT_TIMEOUT ) );
//return ( result == WAIT_OBJECT_0 );
int result = 1;
/*
Return Value
Except in the case of [ETIMEDOUT], all these error checks shall act as if they were performed immediately at the beginning of processing for the function and shall cause an error return, in effect, prior to modifying the state of the mutex specified by mutex or the condition variable specified by cond.
Upon successful completion, a value of zero shall be returned; otherwise, an error number shall be returned to indicate the error.
Errors
The pthread_cond_timedwait() function shall fail if:
ETIMEDOUT
The time specified by abstime to pthread_cond_timedwait() has passed.
The pthread_cond_timedwait() and pthread_cond_wait() functions may fail if:
EINVAL
The value specified by cond, mutex, or abstime is invalid.
EINVAL
Different mutexes were supplied for concurrent pthread_cond_timedwait() or pthread_cond_wait() operations on the same condition variable.
EPERM
The mutex was not owned by the current thread at the time of the call.
*/
assert( !waiting ); // WaitForEvent from multiple threads? that wouldn't be good
if( signaled )
{
// emulate Windows behaviour: signal has been raised already. clear and keep going
signaled = false;
result = 0;
}
else
{
waiting = true;
#if 0
result = pthread_cond_wait( &cond, &mutex );
#else
if( timeout == WAIT_INFINITE )
{
result = pthread_cond_wait( &cond, &mutex );
assert( result == 0 );
}
else
{
timespec ts;
clock_gettime( CLOCK_REALTIME, &ts );
ts.tv_nsec += ( timeout * 1000000 );
result = pthread_cond_timedwait( &cond, &mutex, &ts );
assert( result == 0 || ( timeout != idSysSignal::WAIT_INFINITE && result == ETIMEDOUT ) );
}
#endif
waiting = false;
}
pthread_mutex_unlock( &mutex );
return ( result == 0 );
}
bool Wait( int timeout = WAIT_INFINITE );
private:
pthread_mutex_t mutex;

View file

@ -119,9 +119,10 @@ void Sys_DestroyThread( uintptr_t threadHandle )
}
char name[128];
name[0] = '\0';
pthread_getname_np( threadHandle, name, sizeof( name ) );
#if !defined(__ANDROID__)
#if 1 //!defined(__ANDROID__)
if( pthread_cancel( ( pthread_t )threadHandle ) != 0 )
{
idLib::common->FatalError( "ERROR: pthread_cancel %s failed\n", name );
@ -152,6 +153,128 @@ void Sys_Yield()
================================================================================================
*/
idSysSignal::idSysSignal( bool manualReset )
{
pthread_mutexattr_t attr;
//pthread_mutexattr_init( &attr );
pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_DEFAULT );
pthread_mutex_init( &mutex, &attr );
pthread_mutexattr_destroy( &attr );
pthread_cond_init( &cond, NULL );
signaled = false;
waiting = false;
}
idSysSignal::~idSysSignal()
{
pthread_cond_destroy( &cond );
}
void idSysSignal::Raise()
{
pthread_mutex_lock( &mutex );
if( waiting )
{
pthread_cond_signal( &cond );
}
else
{
// emulate Windows behaviour: if no thread is waiting, leave the signal on so next wait keeps going
signaled = true;
}
pthread_mutex_unlock( &mutex );
}
void idSysSignal::Clear()
{
pthread_mutex_lock( &mutex );
signaled = false;
pthread_mutex_unlock( &mutex );
}
// Wait returns true if the object is in a signalled state and
// returns false if the wait timed out. Wait also clears the signalled
// state when the signalled state is reached within the time out period.
bool idSysSignal::Wait( int timeout )
{
pthread_mutex_lock( &mutex );
//DWORD result = WaitForSingleObject( handle, timeout == idSysSignal::WAIT_INFINITE ? INFINITE : timeout );
//assert( result == WAIT_OBJECT_0 || ( timeout != idSysSignal::WAIT_INFINITE && result == WAIT_TIMEOUT ) );
//return ( result == WAIT_OBJECT_0 );
int result = 0;
/*
Return Value
Except in the case of [ETIMEDOUT], all these error checks shall act as if they were performed immediately at the beginning of processing for the function and shall cause an error return, in effect, prior to modifying the state of the mutex specified by mutex or the condition variable specified by cond.
Upon successful completion, a value of zero shall be returned; otherwise, an error number shall be returned to indicate the error.
Errors
The pthread_cond_timedwait() function shall fail if:
ETIMEDOUT
The time specified by abstime to pthread_cond_timedwait() has passed.
The pthread_cond_timedwait() and pthread_cond_wait() functions may fail if:
EINVAL
The value specified by cond, mutex, or abstime is invalid.
EINVAL
Different mutexes were supplied for concurrent pthread_cond_timedwait() or pthread_cond_wait() operations on the same condition variable.
EPERM
The mutex was not owned by the current thread at the time of the call.
*/
assert( !waiting ); // WaitForEvent from multiple threads? that wouldn't be good
if( signaled )
{
// emulate Windows behaviour: signal has been raised already. clear and keep going
signaled = false;
result = 0;
}
else
{
waiting = true;
#if 0
result = pthread_cond_wait( &cond, &mutex );
#else
if( timeout == WAIT_INFINITE )
{
result = pthread_cond_wait( &cond, &mutex );
assert( result == 0 );
}
else
{
timespec ts;
clock_gettime( CLOCK_REALTIME, &ts );
ts.tv_nsec += ( timeout * 1000000 );
result = pthread_cond_timedwait( &cond, &mutex, &ts );
assert( result == 0 || ( timeout != idSysSignal::WAIT_INFINITE && result == ETIMEDOUT ) );
}
#endif
waiting = false;
}
pthread_mutex_unlock( &mutex );
return ( result == 0 );
}
/*
================================================================================================
@ -193,7 +316,7 @@ Sys_MutexLock
*/
bool Sys_MutexLock( mutexHandle_t& handle, bool blocking )
{
if( pthread_mutex_trylock( &handle ) == 0 )
if( pthread_mutex_trylock( &handle ) != 0 )
{
if( !blocking )
{

View file

@ -47,7 +47,7 @@ typedef LONG interlockedInt_t;
#else
typedef pthread_mutex_t mutexHandle_t;
typedef pthread_cond_t signalHandle_t;
typedef unsigned long interlockedInt_t;
typedef int interlockedInt_t;
#endif
// RB end