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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GPU_COMMAND_BUFFER_MAILBOX_H_
#define GPU_COMMAND_BUFFER_MAILBOX_H_
#include <stdint.h>
#include <string.h>
#include "gpu/gpu_export.h"
// From gl2/gl2ext.h.
#ifndef GL_MAILBOX_SIZE_CHROMIUM
#define GL_MAILBOX_SIZE_CHROMIUM 64
#endif
namespace gpu {
struct GPU_EXPORT Mailbox {
Mailbox();
bool IsZero() const;
void SetZero();
void SetName(const int8_t* name);
// Generate a unique unguessable mailbox name.
static Mailbox Generate();
// Verify that the mailbox was created through Mailbox::Generate. This only
// works in Debug (always returns true in Release). This is not a secure
// check, only to catch bugs where clients forgot to call Mailbox::Generate.
bool Verify() const;
int8_t name[GL_MAILBOX_SIZE_CHROMIUM];
bool operator<(const Mailbox& other) const {
return memcmp(this, &other, sizeof other) < 0;
}
bool operator==(const Mailbox& other) const {
return memcmp(this, &other, sizeof other) == 0;
}
bool operator!=(const Mailbox& other) const {
return !operator==(other);
}
};
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_MAILBOX_H_
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