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#include "cSemaphore.h"
#include "cMCLogger.h"
#ifdef _WIN32
#include <Windows.h>
#else
#include <semaphore.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#endif
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;
char c_Str[32];
sprintf( c_Str, "cSemaphore%p", this );
m_Handle = sem_open( c_Str, O_CREAT, 777, a_InitialCount );
if( m_Handle == SEM_FAILED )
{
LOG("ERROR: Could not create Semaphore. (%i)", errno );
}
else
{
if( sem_unlink( 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
}
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