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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WebGL2Context.h"
#include "GLContext.h"
#include "WebGLSync.h"
#include "mozilla/StaticPrefs_webgl.h"
namespace mozilla {
// -------------------------------------------------------------------------
// Sync objects
RefPtr<WebGLSync> WebGL2Context::FenceSync(GLenum condition, GLbitfield flags) {
const FuncScope funcScope(*this, "fenceSync");
if (IsContextLost()) return nullptr;
if (condition != LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE) {
ErrorInvalidEnum("condition must be SYNC_GPU_COMMANDS_COMPLETE");
return nullptr;
}
if (flags != 0) {
ErrorInvalidValue("flags must be 0");
return nullptr;
}
RefPtr<WebGLSync> globj = new WebGLSync(this, condition, flags);
mPendingSyncs.emplace_back(globj);
EnsurePollPendingSyncs_Pending();
return globj;
}
GLenum WebGL2Context::ClientWaitSync(WebGLSync& sync, GLbitfield flags,
GLuint64 timeout) {
const FuncScope funcScope(*this, "clientWaitSync");
if (IsContextLost()) return LOCAL_GL_WAIT_FAILED;
if (!ValidateObject("sync", sync)) return LOCAL_GL_WAIT_FAILED;
if (flags != 0 && flags != LOCAL_GL_SYNC_FLUSH_COMMANDS_BIT) {
ErrorInvalidValue("`flags` must be SYNC_FLUSH_COMMANDS_BIT or 0.");
return LOCAL_GL_WAIT_FAILED;
}
const auto ret = sync.ClientWaitSync(flags, timeout);
return UnderlyingValue(ret);
}
void WebGLContext::EnsurePollPendingSyncs_Pending() const {
if (mPollPendingSyncs_Pending) return;
mPollPendingSyncs_Pending = NS_NewRunnableFunction(
"WebGLContext::PollPendingSyncs", [weak = WeakPtr{this}]() {
if (const auto strong = RefPtr{weak.get()}) {
strong->mPollPendingSyncs_Pending = nullptr;
strong->PollPendingSyncs();
if (strong->mPendingSyncs.size()) {
// Not done yet...
strong->EnsurePollPendingSyncs_Pending();
}
}
});
if (const auto eventTarget = GetCurrentSerialEventTarget()) {
eventTarget->DelayedDispatch(do_AddRef(mPollPendingSyncs_Pending),
kPollPendingSyncs_DelayMs);
} else {
NS_WARNING(
"[EnsurePollPendingSyncs_Pending] GetCurrentSerialEventTarget() -> "
"nullptr");
}
}
void WebGLContext::PollPendingSyncs() const {
const FuncScope funcScope(*this, "<pollPendingSyncs>");
if (IsContextLost()) return;
while (mPendingSyncs.size()) {
if (const auto sync = RefPtr{mPendingSyncs.front().get()}) {
const auto res = sync->ClientWaitSync(0, 0);
switch (res) {
case ClientWaitSyncResult::WAIT_FAILED:
case ClientWaitSyncResult::TIMEOUT_EXPIRED:
return;
case ClientWaitSyncResult::CONDITION_SATISFIED:
case ClientWaitSyncResult::ALREADY_SIGNALED:
// Communication back to child happens in sync->lientWaitSync.
break;
}
}
mPendingSyncs.pop_front();
}
}
} // namespace mozilla
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