diff --git a/posix_semaphores.c b/posix_semaphores.c
index 3edab09..d9c9a5b 100644
--- a/posix_semaphores.c
+++ b/posix_semaphores.c
@@ -14,6 +14,9 @@ static zend_function_entry posix_semaphores_functions[] = {
 	PHP_FE(posix_sem_open, NULL)
 	PHP_FE(posix_sem_close, NULL)
 	PHP_FE(posix_sem_unlink, NULL)
+	PHP_FE(posix_sem_getvalue, NULL)
+	PHP_FE(posix_sem_post, NULL)
+	PHP_FE(posix_sem_wait, NULL)
 	{NULL, NULL, NULL}
 };
     
@@ -44,6 +47,7 @@ typedef struct _php_posix_semaphore {
 	sem_t *sem;
 } php_posix_semaphore;
 
+
 static void php_posix_semaphore_dtor(zend_rsrc_list_entry *rsrc TSRMLS_DC)
 {
 	php_posix_semaphore *s = (php_posix_semaphore*)rsrc->ptr;
@@ -134,4 +138,87 @@ PHP_FUNCTION(posix_sem_unlink)
 	    RETURN_FALSE;
 	}
 	RETURN_TRUE;
-}
\ No newline at end of file
+}
+
+PHP_FUNCTION(posix_sem_getvalue)
+{
+	php_posix_semaphore *semaphore;
+	zval *zsemaphore;
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "r", &zsemaphore) == FAILURE)
+	{
+		RETURN_NULL();
+	}
+	
+	ZEND_FETCH_RESOURCE(semaphore, php_posix_semaphore*, &zsemaphore, -1, PHP_POSIX_SEMAPHORES_RES_NAME, le_posix_semaphore);
+	if (semaphore->sem)
+	{
+		int value;
+		if (sem_getvalue(semaphore->sem, &value) == -1)
+		{
+			RETURN_NULL();
+		}
+		else
+		{
+			RETURN_LONG(value);
+		}
+	}
+	else
+	{
+		RETURN_NULL();
+	}
+}
+
+PHP_FUNCTION(posix_sem_post)
+{
+	php_posix_semaphore *semaphore;
+	zval *zsemaphore;
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "r", &zsemaphore) == FAILURE)
+	{
+		RETURN_FALSE;
+	}
+	
+	ZEND_FETCH_RESOURCE(semaphore, php_posix_semaphore*, &zsemaphore, -1, PHP_POSIX_SEMAPHORES_RES_NAME, le_posix_semaphore);
+	if (semaphore->sem)
+	{
+		if (sem_post(semaphore->sem) == -1)
+		{
+			RETURN_FALSE;
+		}
+		else
+		{
+			RETURN_TRUE;
+		}
+	}
+	else
+	{
+		RETURN_FALSE;
+	}
+}
+
+PHP_FUNCTION(posix_sem_wait)
+{
+	php_posix_semaphore *semaphore;
+	zval *zsemaphore;
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "r", &zsemaphore) == FAILURE)
+	{
+		RETURN_FALSE;
+	}
+	
+	ZEND_FETCH_RESOURCE(semaphore, php_posix_semaphore*, &zsemaphore, -1, PHP_POSIX_SEMAPHORES_RES_NAME, le_posix_semaphore);
+	if (semaphore->sem)
+	{
+		if (sem_wait(semaphore->sem) == -1)
+		{
+			RETURN_FALSE;
+		}
+		else
+		{
+			RETURN_TRUE;
+		}
+	}
+	else
+	{
+		RETURN_FALSE;
+	}
+}
+
diff --git a/posix_semaphores.h b/posix_semaphores.h
index 721b1d3..6685d12 100644
--- a/posix_semaphores.h
+++ b/posix_semaphores.h
@@ -10,6 +10,9 @@ PHP_MSHUTDOWN_FUNCTION(posix_semaphores);
 PHP_FUNCTION(posix_sem_open);
 PHP_FUNCTION(posix_sem_close);
 PHP_FUNCTION(posix_sem_unlink);
+PHP_FUNCTION(posix_sem_getvalue);
+PHP_FUNCTION(posix_sem_post);
+PHP_FUNCTION(posix_sem_wait);
 
 extern zend_module_entry posix_semaphores_module_entry;
 #define phpext_posix_semaphores_ptr &posix_semaphores_module_entry;