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