#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules
cSemaphore::cSemaphore( unsigned int a_MaxCount, unsigned int a_InitialCount /* = 0 */ )
#ifndef _WIN32
: m_bNamed( false )
#endif
{
#ifndef _WIN32
(void)a_MaxCount;
m_Handle = new sem_t;
if (sem_init( (sem_t*)m_Handle, 0, 0))
{
LOG("WARNING cSemaphore: Could not create unnamed semaphore, fallback to named.");
delete (sem_t*)m_Handle; // named semaphores return their own address
m_bNamed = true;
AString Name;
Printf(Name, "cSemaphore%p", this );
m_Handle = sem_open(Name.c_str(), O_CREAT, 777, a_InitialCount);
if( m_Handle == SEM_FAILED )
{
LOG("ERROR: Could not create Semaphore. (%i)", errno );
}
else
{
if( sem_unlink(Name.c_str()) != 0 )
{
LOG("ERROR: Could not unlink cSemaphore. (%i)", errno);
}
}
}
#else
m_Handle = CreateSemaphore(
NULL, // security attribute
a_InitialCount, // initial count
a_MaxCount, // maximum count
0 // name (optional)
);
#endif
}
cSemaphore::~cSemaphore()
{
#ifdef _WIN32
CloseHandle( m_Handle );
#else
if( m_bNamed )
{
if( sem_close( (sem_t*)m_Handle ) != 0 )
{
LOG("ERROR: Could not close cSemaphore. (%i)", errno);
}
}
else
{
sem_destroy( (sem_t*)m_Handle );
delete (sem_t*)m_Handle;
}
m_Handle = 0;
#endif
}
void cSemaphore::Wait()
{
#ifndef _WIN32
if( sem_wait( (sem_t*)m_Handle ) != 0)
{
LOG("ERROR: Could not wait for cSemaphore. (%i)", errno);
}
#else
WaitForSingleObject( m_Handle, INFINITE);
#endif
}
void cSemaphore::Signal()
{
#ifndef _WIN32
if( sem_post( (sem_t*)m_Handle ) != 0 )
{
LOG("ERROR: Could not signal cSemaphore. (%i)", errno);
}
#else
ReleaseSemaphore( m_Handle, 1, NULL );
#endif
}
