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/*
* Copyright (c) 2013 The WebRTC 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 in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_DESKTOP_CAPTURE_LINUX_X11_X_ERROR_TRAP_H_
#define MODULES_DESKTOP_CAPTURE_LINUX_X11_X_ERROR_TRAP_H_
#include <X11/Xlibint.h>
#undef max // Xlibint.h defines this and it breaks std::max
#undef min // Xlibint.h defines this and it breaks std::min
namespace webrtc {
// Helper class that registers X Window error handler. Caller can use
// GetLastErrorAndDisable() to get the last error that was caught, if any.
// An XErrorTrap may be constructed on any thread, but errors are collected
// from all threads and so |display| should be used only on one thread.
// Other Displays are unaffected.
class XErrorTrap {
public:
explicit XErrorTrap(Display* display);
~XErrorTrap();
XErrorTrap(const XErrorTrap&) = delete;
XErrorTrap& operator=(const XErrorTrap&) = delete;
// Returns last error and removes unregisters the error handler.
// Must not be called more than once.
int GetLastErrorAndDisable();
private:
static Bool XServerErrorHandler(Display* display, xReply* rep,
char* /* buf */, int /* len */,
XPointer data);
_XAsyncHandler async_handler_;
Display* display_;
unsigned long last_ignored_request_;
int last_xserver_error_code_;
bool enabled_;
};
} // namespace webrtc
#endif // MODULES_DESKTOP_CAPTURE_LINUX_X11_X_ERROR_TRAP_H_