From 90d5b8b4a064420d74678654e94ea4755b377f21 Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <eighthave@users.sourceforge.net>
Date: Thu, 15 Dec 2005 00:57:02 +0000
Subject: checking in missing files on behalf of Miller (cleared it with him
 first).  The files are from portmidi17nov04.zip

svn path=/trunk/; revision=4216
---
 pd/portmidi/porttime/ptmacosx_cf.c | 135 +++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 pd/portmidi/porttime/ptmacosx_cf.c

(limited to 'pd/portmidi/porttime/ptmacosx_cf.c')

diff --git a/pd/portmidi/porttime/ptmacosx_cf.c b/pd/portmidi/porttime/ptmacosx_cf.c
new file mode 100644
index 00000000..c0c22a32
--- /dev/null
+++ b/pd/portmidi/porttime/ptmacosx_cf.c
@@ -0,0 +1,135 @@
+/* ptmacosx.c -- portable timer implementation for mac os x */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <pthread.h>
+#include <CoreFoundation/CoreFoundation.h>
+
+#import <mach/mach.h>
+#import <mach/mach_error.h>
+#import <mach/mach_time.h>
+#import <mach/clock.h>
+
+#include "porttime.h"
+
+#define THREAD_IMPORTANCE 30
+#define LONG_TIME 1000000000.0
+
+static int time_started_flag = FALSE;
+static CFAbsoluteTime startTime = 0.0;
+static CFRunLoopRef timerRunLoop;
+
+typedef struct {
+    int resolution;
+    PtCallback *callback;
+    void *userData;
+} PtThreadParams;
+
+
+void Pt_CFTimerCallback(CFRunLoopTimerRef timer, void *info)
+{
+    PtThreadParams *params = (PtThreadParams*)info;
+    (*params->callback)(Pt_Time(), params->userData);
+}
+
+static void* Pt_Thread(void *p)
+{
+    CFTimeInterval timerInterval;
+    CFRunLoopTimerContext timerContext;
+    CFRunLoopTimerRef timer;
+    PtThreadParams *params = (PtThreadParams*)p;
+    //CFTimeInterval timeout;
+
+    /* raise the thread's priority */
+    kern_return_t error;
+    thread_extended_policy_data_t extendedPolicy;
+    thread_precedence_policy_data_t precedencePolicy;
+
+    extendedPolicy.timeshare = 0;
+    error = thread_policy_set(mach_thread_self(), THREAD_EXTENDED_POLICY,
+                              (thread_policy_t)&extendedPolicy,
+                              THREAD_EXTENDED_POLICY_COUNT);
+    if (error != KERN_SUCCESS) {
+        mach_error("Couldn't set thread timeshare policy", error);
+    }
+
+    precedencePolicy.importance = THREAD_IMPORTANCE;
+    error = thread_policy_set(mach_thread_self(), THREAD_PRECEDENCE_POLICY,
+                              (thread_policy_t)&precedencePolicy,
+                              THREAD_PRECEDENCE_POLICY_COUNT);
+    if (error != KERN_SUCCESS) {
+        mach_error("Couldn't set thread precedence policy", error);
+    }
+
+    /* set up the timer context */
+    timerContext.version = 0;
+    timerContext.info = params;
+    timerContext.retain = NULL;
+    timerContext.release = NULL;
+    timerContext.copyDescription = NULL;
+
+    /* create a new timer */
+    timerInterval = (double)params->resolution / 1000.0;
+    timer = CFRunLoopTimerCreate(NULL, startTime+timerInterval, timerInterval,
+                                 0, 0, Pt_CFTimerCallback, &timerContext);
+
+    timerRunLoop = CFRunLoopGetCurrent();
+    CFRunLoopAddTimer(timerRunLoop, timer, CFSTR("PtTimeMode"));
+
+    /* run until we're told to stop by Pt_Stop() */
+    CFRunLoopRunInMode(CFSTR("PtTimeMode"), LONG_TIME, false);
+    
+    CFRunLoopRemoveTimer(CFRunLoopGetCurrent(), timer, CFSTR("PtTimeMode"));
+    CFRelease(timer);
+    free(params);
+
+    return NULL;
+}
+
+PtError Pt_Start(int resolution, PtCallback *callback, void *userData)
+{
+    PtThreadParams *params = (PtThreadParams*)malloc(sizeof(PtThreadParams));
+    pthread_t pthread_id;
+
+    printf("Pt_Start() called\n");
+
+    // /* make sure we're not already playing */
+    if (time_started_flag) return ptAlreadyStarted;
+    startTime = CFAbsoluteTimeGetCurrent();
+
+    if (callback) {
+    
+        params->resolution = resolution;
+        params->callback = callback;
+        params->userData = userData;
+    
+        pthread_create(&pthread_id, NULL, Pt_Thread, params);
+    }
+
+    time_started_flag = TRUE;
+    return ptNoError;
+}
+
+
+PtError Pt_Stop()
+{
+    printf("Pt_Stop called\n");
+
+    CFRunLoopStop(timerRunLoop);
+    time_started_flag = FALSE;
+    return ptNoError;
+}
+
+
+int Pt_Started()
+{
+    return time_started_flag;
+}
+
+
+PtTimestamp Pt_Time()
+{
+    CFAbsoluteTime now = CFAbsoluteTimeGetCurrent();
+    return (PtTimestamp) ((now - startTime) * 1000.0);
+}
+
-- 
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