X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=ref_counted_gl_sync.h;h=8b6db680a2c31ffa66ce36c799f1475769937033;hb=d3e48df512d9476d3849227067792a3537bb094e;hp=5e23752dd2c3ea80e75321cc6e4453e0f5d7e884;hpb=6531415ce7a0010195cb3267c6898475d38922ac;p=nageru

diff --git a/ref_counted_gl_sync.h b/ref_counted_gl_sync.h
index 5e23752..8b6db68 100644
--- a/ref_counted_gl_sync.h
+++ b/ref_counted_gl_sync.h
@@ -6,8 +6,9 @@
 // places. (We could set two fences at the same time, but they are not an
 // unlimited hardware resource, so it would be a bit wasteful.)
 
-#include <GL/gl.h>
+#include <epoxy/gl.h>
 #include <memory>
+#include <mutex>
 
 typedef std::shared_ptr<__GLsync> RefCountedGLsyncBase;
 
@@ -16,7 +17,23 @@ public:
 	RefCountedGLsync() {}
 
 	RefCountedGLsync(GLenum condition, GLbitfield flags) 
-		: RefCountedGLsyncBase(glFenceSync(condition, flags), glDeleteSync) {}
+		: RefCountedGLsyncBase(locked_glFenceSync(condition, flags), glDeleteSync) {}
+
+private:
+	// These are to work around apitrace bug #446.
+	static GLsync locked_glFenceSync(GLenum condition, GLbitfield flags)
+	{
+		std::lock_guard<std::mutex> lock(fence_lock);
+		return glFenceSync(condition, flags);
+	}
+
+	static void locked_glDeleteSync(GLsync sync)
+	{
+		std::lock_guard<std::mutex> lock(fence_lock);
+		glDeleteSync(sync);
+	}
+
+	static std::mutex fence_lock;
 };
 
 #endif  // !defined(_REF_COUNTED_GL_SYNC_H)