//
// Copyright 2019 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// SyncEGL.cpp: Implements the rx::SyncEGL class.

#include "libANGLE/renderer/gl/egl/SyncEGL.h"

#include "libANGLE/AttributeMap.h"
#include "libANGLE/Display.h"
#include "libANGLE/renderer/gl/egl/FunctionsEGL.h"

namespace rx
{

SyncEGL::SyncEGL(const egl::AttributeMap &attribs, const FunctionsEGL *egl)
    : mEGL(egl),
      mNativeFenceFD(
          attribs.getAsInt(EGL_SYNC_NATIVE_FENCE_FD_ANDROID, EGL_NO_NATIVE_FENCE_FD_ANDROID)),
      mSync(EGL_NO_SYNC_KHR)
{}

SyncEGL::~SyncEGL()
{
    ASSERT(mSync == EGL_NO_SYNC_KHR);
}

void SyncEGL::onDestroy(const egl::Display *display)
{
    if (mSync != EGL_NO_SYNC_KHR)
    {
        mEGL->destroySyncKHR(mSync);
        mSync = EGL_NO_SYNC_KHR;
    }
}

egl::Error SyncEGL::initialize(const egl::Display *display,
                               const gl::Context *context,
                               EGLenum type)
{
    ASSERT(type == EGL_SYNC_FENCE_KHR || type == EGL_SYNC_NATIVE_FENCE_ANDROID);

    constexpr size_t kAttribVectorSize = 3;
    angle::FixedVector<EGLint, kAttribVectorSize> attribs;
    if (type == EGL_SYNC_NATIVE_FENCE_ANDROID)
    {
        attribs.push_back(EGL_SYNC_NATIVE_FENCE_FD_ANDROID);
        attribs.push_back(mNativeFenceFD);
    }
    attribs.push_back(EGL_NONE);

    mSync = mEGL->createSyncKHR(type, attribs.data());
    if (mSync == EGL_NO_SYNC_KHR)
    {
        return egl::Error(mEGL->getError(), "eglCreateSync failed to create sync object");
    }

    return egl::NoError();
}

egl::Error SyncEGL::clientWait(const egl::Display *display,
                               const gl::Context *context,
                               EGLint flags,
                               EGLTime timeout,
                               EGLint *outResult)
{
    ASSERT(mSync != EGL_NO_SYNC_KHR);
    EGLint result = mEGL->clientWaitSyncKHR(mSync, flags, timeout);

    if (result == EGL_FALSE)
    {
        return egl::Error(mEGL->getError(), "eglClientWaitSync failed");
    }

    *outResult = result;
    return egl::NoError();
}

egl::Error SyncEGL::serverWait(const egl::Display *display,
                               const gl::Context *context,
                               EGLint flags)
{
    ASSERT(mSync != EGL_NO_SYNC_KHR);
    EGLint result = mEGL->waitSyncKHR(mSync, flags);

    if (result == EGL_FALSE)
    {
        return egl::Error(mEGL->getError(), "eglWaitSync failed");
    }

    return egl::NoError();
}

egl::Error SyncEGL::getStatus(const egl::Display *display, EGLint *outStatus)
{
    ASSERT(mSync != EGL_NO_SYNC_KHR);
    EGLBoolean result = mEGL->getSyncAttribKHR(mSync, EGL_SYNC_STATUS_KHR, outStatus);

    if (result == EGL_FALSE)
    {
        return egl::Error(mEGL->getError(), "eglGetSyncAttribKHR with EGL_SYNC_STATUS_KHR failed");
    }

    return egl::NoError();
}

egl::Error SyncEGL::dupNativeFenceFD(const egl::Display *display, EGLint *result) const
{
    ASSERT(mSync != EGL_NO_SYNC_KHR);
    *result = mEGL->dupNativeFenceFDANDROID(mSync);
    if (*result == EGL_NO_NATIVE_FENCE_FD_ANDROID)
    {
        return egl::Error(mEGL->getError(), "eglDupNativeFenceFDANDROID failed");
    }

    return egl::NoError();
}

}  // namespace rx
