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authormadmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>2012-09-23 23:23:33 +0200
committermadmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>2012-09-23 23:23:33 +0200
commit7abb5f7604bb9a0a716e89f3b27e330b016a38b9 (patch)
tree7ccaea302b953c239a0d60548b6f7bcaf72e6527 /source/OSSupport/Semaphore.cpp
parentSource files cleanup: Removed unused cBlockToPickup (diff)
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Diffstat (limited to 'source/OSSupport/Semaphore.cpp')
-rw-r--r--source/OSSupport/Semaphore.cpp91
1 files changed, 91 insertions, 0 deletions
diff --git a/source/OSSupport/Semaphore.cpp b/source/OSSupport/Semaphore.cpp
new file mode 100644
index 000000000..468de6858
--- /dev/null
+++ b/source/OSSupport/Semaphore.cpp
@@ -0,0 +1,91 @@
+
+#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
+}