/* Copyright (c) 2010, Google Inc.
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*
* ---
* Author: Chris Ruemmler
*/
#ifndef BASE_AUXILIARY_SYNCHRONIZATION_PROFILING_H_
#define BASE_AUXILIARY_SYNCHRONIZATION_PROFILING_H_
#include "base/basictypes.h"
namespace base {
// We can do contention-profiling of SpinLocks, but the code is in
// mutex.cc, which is not always linked in with spinlock. Hence we
// provide a weak definition, which are used if mutex.cc isn't linked in.
// Submit the number of cycles the spinlock spent contending.
ATTRIBUTE_WEAK extern void SubmitSpinLockProfileData(const void *, int64);
extern void SubmitSpinLockProfileData(const void *contendedlock,
int64 wait_cycles) {}
}
#endif // BASE_AUXILIARY_SYNCHRONIZATION_PROFILING_H_