From 386d58b5862d8b76925c6523721594887606e82a Mon Sep 17 00:00:00 2001
From: faketruth <faketruth@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Mon, 3 Oct 2011 18:41:19 +0000
Subject: MCServer c++ source files

git-svn-id: http://mc-server.googlecode.com/svn/trunk@3 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 source/cSemaphore.cpp | 96 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 source/cSemaphore.cpp

(limited to 'source/cSemaphore.cpp')

diff --git a/source/cSemaphore.cpp b/source/cSemaphore.cpp
new file mode 100644
index 000000000..96c542df6
--- /dev/null
+++ b/source/cSemaphore.cpp
@@ -0,0 +1,96 @@
+#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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