1 files changed, 70 insertions, 0 deletions

diff --git a/portmidi/porttime/ptwinmm.c b/portmidi/porttime/ptwinmm.c
new file mode 100755
index 0000000..5204659
--- /dev/null
+++ b/portmidi/porttime/ptwinmm.c
@@ -0,0 +1,70 @@
+/* ptwinmm.c -- portable timer implementation for win32 */

+

+

+#include "porttime.h"

+#include "windows.h"

+#include "time.h"

+

+

+TIMECAPS caps;

+

+static long time_offset = 0;

+static int time_started_flag = FALSE;

+static long time_resolution;

+static MMRESULT timer_id;

+static PtCallback *time_callback;

+

+void CALLBACK winmm_time_callback(UINT uID, UINT uMsg, DWORD_PTR dwUser, 

+                                  DWORD_PTR dw1, DWORD_PTR dw2)

+{

+    (*time_callback)(Pt_Time(), (void *) dwUser);

+}

+ 

+

+PMEXPORT PtError Pt_Start(int resolution, PtCallback *callback, void *userData)

+{

+    if (time_started_flag) return ptAlreadyStarted;

+    timeBeginPeriod(resolution);

+    time_resolution = resolution;

+    time_offset = timeGetTime();

+    time_started_flag = TRUE;

+    time_callback = callback;

+    if (callback) {

+        timer_id = timeSetEvent(resolution, 1, winmm_time_callback, 

+            (DWORD_PTR) userData, TIME_PERIODIC | TIME_CALLBACK_FUNCTION);

+        if (!timer_id) return ptHostError;

+    }

+    return ptNoError;

+}

+

+

+PMEXPORT PtError Pt_Stop()

+{

+    if (!time_started_flag) return ptAlreadyStopped;

+    if (time_callback && timer_id) {

+        timeKillEvent(timer_id);

+        time_callback = NULL;

+        timer_id = 0;

+    }

+    time_started_flag = FALSE;

+    timeEndPeriod(time_resolution);

+    return ptNoError;

+}

+

+

+PMEXPORT int Pt_Started()

+{

+    return time_started_flag;

+}

+

+

+PMEXPORT PtTimestamp Pt_Time()

+{

+    return timeGetTime() - time_offset;

+}

+

+

+PMEXPORT void Pt_Sleep(int32_t duration)

+{

+    Sleep(duration);

+}