From a97ecb8690c64a6007ad3f0e983cb8ef67b47795 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Fri, 11 Jan 2008 06:01:51 -0800
Subject: [PATCH] Add a timing wrapper, using gettimeofday

---
 CMakeLists.txt            |  5 +++++
 OpenAL32/Include/alMain.h | 16 ++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a35c5dea..86fc4fd1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -132,6 +132,11 @@ ENDIF()
 # Check if we have Windows headers
 CHECK_INCLUDE_FILE(windows.h HAVE_WINDOWS_H)
 IF(NOT "${HAVE_WINDOWS_H}")
+    CHECK_FUNCTION_EXISTS(gettimeofday HAVE_GETTIMEOFDAY)
+    IF(NOT "${HAVE_GETTIMEOFDAY}")
+        MESSAGE(FATAL_ERROR "No timing function found!")
+    ENDIF()
+
     # We need pthreads outside of Windows
     CHECK_INCLUDE_FILE(pthread.h HAVE_PTHREAD_H)
     IF(NOT "${HAVE_PTHREAD_H}")
diff --git a/OpenAL32/Include/alMain.h b/OpenAL32/Include/alMain.h
index d8611a71..adf3f2c3 100644
--- a/OpenAL32/Include/alMain.h
+++ b/OpenAL32/Include/alMain.h
@@ -13,6 +13,7 @@
 
 #include <assert.h>
 #include <pthread.h>
+#include <sys/time.h>
 
 #define IsBadWritePtr(a,b) (0)
 
@@ -52,6 +53,21 @@ static inline void DeleteCriticalSection(CRITICAL_SECTION *cs)
     assert(ret == 0);
 }
 
+/* NOTE: This wrapper isn't quite accurate as it returns an ALuint, as opposed
+ * to the expected DWORD. Both are defined as unsigned 32-bit types, however.
+ * Additionally, Win32 is supposed to measure the time since Windows started,
+ * as opposed to the actual time. */
+static inline ALuint timeGetTime(void)
+{
+    struct timeval tv;
+    int ret;
+
+    ret = gettimeofday(&tv, NULL);
+    assert(ret == 0);
+
+    return tv.tv_usec/1000 + tv.tv_sec*1000;
+}
+
 #define min(x,y) (((x)<(y))?(x):(y))
 #define max(x,y) (((x)>(y))?(x):(y))
 #endif
-- 
2.11.4.GIT