Initial commit: server + serverfiles

server/libsql/Semaphore.cpp

@@ -0,0 +1,142 @@
+#include "stdafx.h"
+#include "Semaphore.h"
+
+#ifndef __WIN32__
+
+CSemaphore::CSemaphore() : m_hSem(NULL)
+{
+	Initialize();
+}
+
+CSemaphore::~CSemaphore()
+{
+	Destroy();
+}
+
+int CSemaphore::Initialize()
+{
+	Clear();
+
+	m_hSem = new sem_t;
+
+	if (sem_init(m_hSem, 0, 0) == -1)
+	{
+		perror("sem_init");
+		return false;
+	}
+
+	return true;
+}
+
+void CSemaphore::Destroy()
+{
+	Clear();
+}
+
+void CSemaphore::Clear()
+{
+	if (m_hSem)
+	{
+		sem_destroy(m_hSem);
+		delete m_hSem;
+	}
+
+	m_hSem = NULL;
+}
+
+int CSemaphore::Wait()
+{
+	if (!m_hSem)
+		return true;
+
+	int re = sem_wait(m_hSem);
+
+	if (re == -1)
+	{
+		if (errno == EINTR)
+			return Wait();
+
+		perror("sem_wait");
+		return false;
+	}
+
+	return true;
+}
+
+int CSemaphore::Release(int count)
+{
+	if (!m_hSem)
+		return false;
+
+	for (int i = 0; i < count; ++i)
+		sem_post(m_hSem);
+
+	return true;
+}
+
+#else
+
+CSemaphore::CSemaphore() : m_hSem(NULL)
+{
+	Initialize();
+}
+
+CSemaphore::~CSemaphore()
+{
+	Destroy();
+}
+
+int CSemaphore::Initialize()
+{
+	Clear();
+
+	m_hSem = ::CreateSemaphore(NULL, 0, 32, NULL);
+
+	if (m_hSem == NULL) {
+		return false;
+	}
+
+	return true;
+}
+
+void CSemaphore::Destroy()
+{
+	Clear();
+}
+
+void CSemaphore::Clear()
+{
+	if (m_hSem == NULL) {
+		return;
+	}
+	::CloseHandle(m_hSem);
+	m_hSem = NULL;
+}
+
+int CSemaphore::Wait()
+{
+	if (!m_hSem)
+		return true;
+
+	DWORD dwWaitResult = ::WaitForSingleObject(m_hSem, INFINITE);
+
+	switch (dwWaitResult) {
+		case WAIT_OBJECT_0:
+			return true;
+		default:
+			break;
+	}
+	return false;
+}
+
+int CSemaphore::Release(int count)
+{
+	if (!m_hSem)
+		return false;
+
+	::ReleaseSemaphore(m_hSem, count, NULL);
+
+	return true;
+}
+
+#endif