dom/canvas/WebGLSync.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "WebGLSync.h"
   7
   8 #include "GLContext.h"
   9 #include "mozilla/dom/WebGL2RenderingContextBinding.h"
  10 #include "WebGLContext.h"
  11
  12 namespace mozilla {
  13
  14 WebGLSync::WebGLSync(WebGLContext* webgl, GLenum condition, GLbitfield flags)
  15     : WebGLContextBoundObject(webgl),
  16       mGLName(mContext->gl->fFenceSync(condition, flags)),
  17       mFenceId(mContext->mNextFenceId) {
  18   mContext->mNextFenceId += 1;
  19 }
  20
  21 WebGLSync::~WebGLSync() {
  22   if (!mContext) return;
  23   mContext->gl->fDeleteSync(mGLName);
  24 }
  25
  26 ClientWaitSyncResult WebGLSync::ClientWaitSync(const GLbitfield flags,
  27                                                const GLuint64 timeout) {
  28   if (!mContext) return ClientWaitSyncResult::WAIT_FAILED;
  29   if (IsKnownComplete()) return ClientWaitSyncResult::ALREADY_SIGNALED;
  30
  31   auto ret = ClientWaitSyncResult::WAIT_FAILED;
  32   bool newlyComplete = false;
  33   const auto status = static_cast<ClientWaitSyncResult>(
  34       mContext->gl->fClientWaitSync(mGLName, 0, 0));
  35   switch (status) {
  36     case ClientWaitSyncResult::TIMEOUT_EXPIRED:  // Poll() -> false
  37     case ClientWaitSyncResult::WAIT_FAILED:      // Error
  38       ret = status;
  39       break;
  40     case ClientWaitSyncResult::CONDITION_SATISFIED:  // Should never happen, but
  41                                                      // tolerate it.
  42     case ClientWaitSyncResult::ALREADY_SIGNALED:     // Poll() -> true
  43       newlyComplete = true;
  44       ret = status;
  45       break;
  46   }
  47
  48   if (newlyComplete) {
  49     if (mContext->mCompletedFenceId < mFenceId) {
  50       mContext->mCompletedFenceId = mFenceId;
  51     }
  52     MOZ_RELEASE_ASSERT(mOnCompleteTasks);
  53     for (const auto& task : *mOnCompleteTasks) {
  54       (*task)();
  55     }
  56     mOnCompleteTasks = {};
  57   }
  58   return ret;
  59 }
  60
  61 }  // namespace mozilla