git.sesse.net Git - nageru/blob - ref_counted_gl_sync.h

   1 #ifndef _REF_COUNTED_GL_SYNC_H
   2 #define _REF_COUNTED_GL_SYNC_H 1
   3
   4 // A wrapper around GLsync (OpenGL fences) that is automatically refcounted.
   5 // Useful since we sometimes want to use the same fence two entirely different
   6 // places. (We could set two fences at the same time, but they are not an
   7 // unlimited hardware resource, so it would be a bit wasteful.)
   8
   9 #include <epoxy/gl.h>
  10 #include <memory>
  11 #include <mutex>
  12
  13 typedef std::shared_ptr<__GLsync> RefCountedGLsyncBase;
  14
  15 class RefCountedGLsync : public RefCountedGLsyncBase {
  16 public:
  17         RefCountedGLsync() {}
  18
  19         RefCountedGLsync(GLenum condition, GLbitfield flags)
  20                 : RefCountedGLsyncBase(locked_glFenceSync(condition, flags), glDeleteSync) {}
  21
  22 private:
  23         // These are to work around apitrace bug #446.
  24         static GLsync locked_glFenceSync(GLenum condition, GLbitfield flags)
  25         {
  26                 std::lock_guard<std::mutex> lock(fence_lock);
  27                 return glFenceSync(condition, flags);
  28         }
  29
  30         static void locked_glDeleteSync(GLsync sync)
  31         {
  32                 std::lock_guard<std::mutex> lock(fence_lock);
  33                 glDeleteSync(sync);
  34         }
  35
  36         static std::mutex fence_lock;
  37 };
  38
  39 #endif  // !defined(_REF_COUNTED_GL_SYNC_H)