X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=retrace%2Fglws_cocoa.mm;h=e410862f1996aa278d64db22c2ec3ba4eac81694;hb=HEAD;hp=1dd9fee78ea7e0f54550c64a2526814ab62d1bf3;hpb=4a5b1f5cf04a72ba8c148977d0539fc1fb1e1004;p=apitrace

diff --git a/retrace/glws_cocoa.mm b/retrace/glws_cocoa.mm
index 1dd9fee..e410862 100644
--- a/retrace/glws_cocoa.mm
+++ b/retrace/glws_cocoa.mm
@@ -33,6 +33,8 @@
  * - http://developer.apple.com/library/mac/#samplecode/glut/Introduction/Intro.html
  * - http://developer.apple.com/library/mac/#samplecode/GLEssentials/Introduction/Intro.html
  * - http://www.glfw.org/
+ * - http://cocoasamurai.blogspot.co.uk/2008/04/guide-to-threading-on-leopard.html
+ * - http://developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/Multithreading/Introduction/Introduction.html
  */
 
 
@@ -48,10 +50,32 @@
 #include "glws.hpp"
 
 
+/**
+ * Dummy thread to force Cocoa to enter multithreading mode.
+ */
+@interface DummyThread : NSObject
+    + (void)enterMultiThreaded;
+    + (void)dummyThreadMethod:(id)unused;
+@end
+
+@implementation DummyThread
+    + (void)dummyThreadMethod:(id)unused {
+        (void)unused;
+    }
+
+    + (void)enterMultiThreaded {
+        [NSThread detachNewThreadSelector:@selector(dummyThreadMethod:)
+                  toTarget:self
+                  withObject:nil];
+    }
+@end
+
+
 namespace glws {
 
 
-NSAutoreleasePool *autoreleasePool = nil;
+static __thread NSAutoreleasePool *
+autoreleasePool = nil;
 
 
 class CocoaVisual : public Visual
@@ -159,14 +183,29 @@ public:
 };
 
 
+static inline void
+initThread(void) {
+    if (autoreleasePool == nil) {
+        autoreleasePool = [[NSAutoreleasePool alloc] init];
+    }
+}
+
 void
 init(void) {
     // Prevent glproc to load system's OpenGL, so that we can trace glretrace.
     _libGlHandle = dlopen("OpenGL", RTLD_LOCAL | RTLD_NOW | RTLD_FIRST);
 
-    [NSApplication sharedApplication];
+    initThread();
+
+    [DummyThread enterMultiThreaded];
 
-    autoreleasePool = [[NSAutoreleasePool alloc] init];
+    bool isMultiThreaded = [NSThread isMultiThreaded];
+    if (!isMultiThreaded) {
+        std::cerr << "error: failed to enable Cocoa multi-threading\n";
+	exit(1);
+    }
+
+    [NSApplication sharedApplication];
 
     [NSApp finishLaunching];
 }
@@ -180,6 +219,9 @@ cleanup(void) {
 
 Visual *
 createVisual(bool doubleBuffer, Profile profile) {
+
+    initThread();
+
     if (profile != PROFILE_COMPAT &&
         profile != PROFILE_CORE) {
         return nil;
@@ -218,12 +260,16 @@ createVisual(bool doubleBuffer, Profile profile) {
 Drawable *
 createDrawable(const Visual *visual, int width, int height, bool pbuffer)
 {
+    initThread();
+
     return new CocoaDrawable(visual, width, height, pbuffer);
 }
 
 Context *
 createContext(const Visual *visual, Context *shareContext, Profile profile, bool debug)
 {
+    initThread();
+
     NSOpenGLPixelFormat *pixelFormat = static_cast<const CocoaVisual *>(visual)->pixelFormat;
     NSOpenGLContext *share_context = nil;
     NSOpenGLContext *context;
@@ -248,6 +294,8 @@ createContext(const Visual *visual, Context *shareContext, Profile profile, bool
 bool
 makeCurrent(Drawable *drawable, Context *context)
 {
+    initThread();
+
     if (!drawable || !context) {
         [NSOpenGLContext clearCurrentContext];
     } else {
@@ -266,8 +314,9 @@ makeCurrent(Drawable *drawable, Context *context)
 
 bool
 processEvents(void) {
-   NSEvent* event;
+    initThread();
 
+    NSEvent* event;
     do {
         event = [NSApp nextEventMatchingMask:NSAnyEventMask
                                    untilDate:[NSDate distantPast]