1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef GPU_COMMAND_BUFFER_MAILBOX_H_ 6 #define GPU_COMMAND_BUFFER_MAILBOX_H_ 7 8 #include <stdint.h> 9 #include <string.h> 10 11 #include "gpu/gpu_export.h" 12 13 // From gl2/gl2ext.h. 14 #ifndef GL_MAILBOX_SIZE_CHROMIUM 15 #define GL_MAILBOX_SIZE_CHROMIUM 64 16 #endif 17 18 namespace gpu { 19 20 struct GPU_EXPORT Mailbox { 21 Mailbox(); 22 bool IsZero() const; 23 void SetZero(); 24 void SetName(const int8_t* name); 25 26 // Generate a unique unguessable mailbox name. 27 static Mailbox Generate(); 28 29 // Verify that the mailbox was created through Mailbox::Generate. This only 30 // works in Debug (always returns true in Release). This is not a secure 31 // check, only to catch bugs where clients forgot to call Mailbox::Generate. 32 bool Verify() const; 33 34 int8_t name[GL_MAILBOX_SIZE_CHROMIUM]; 35 bool operator<(const Mailbox& other) const { 36 return memcmp(this, &other, sizeof other) < 0; 37 } 38 bool operator==(const Mailbox& other) const { 39 return memcmp(this, &other, sizeof other) == 0; 40 } 41 bool operator!=(const Mailbox& other) const { 42 return !operator==(other); 43 } 44 }; 45 46 } // namespace gpu 47 48 #endif // GPU_COMMAND_BUFFER_MAILBOX_H_ 49 50
