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// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
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*
* ---
* Author: Sanjay Ghemawat
*
* Module for heap-profiling.
*
* For full(er) information, see docs/heapprofile.html
*
* This module can be linked into your program with
* no slowdown caused by this unless you activate the profiler
* using one of the following methods:
*
* 1. Before starting the program, set the environment variable
* "HEAPPROFILE" to be the name of the file to which the profile
* data should be written.
*
* 2. Programmatically, start and stop the profiler using the
* routines "HeapProfilerStart(filename)" and "HeapProfilerStop()".
*
*/
#ifndef BASE_HEAP_PROFILER_H_
#define BASE_HEAP_PROFILER_H_
#include <stddef.h>
/* Annoying stuff for windows; makes sure clients can import these functions */
#ifndef PERFTOOLS_DLL_DECL
# ifdef _WIN32
# define PERFTOOLS_DLL_DECL __declspec(dllimport)
# else
# define PERFTOOLS_DLL_DECL
# endif
#endif
/* All this code should be usable from within C apps. */
#ifdef __cplusplus
extern "C" {
#endif
/* Start profiling and arrange to write profile data to file names
* of the form: "prefix.0000", "prefix.0001", ...
*/
PERFTOOLS_DLL_DECL void HeapProfilerStart(const char* prefix);
/* Returns non-zero if we are currently profiling the heap. (Returns
* an int rather than a bool so it's usable from C.) This is true
* between calls to HeapProfilerStart() and HeapProfilerStop(), and
* also if the program has been run with HEAPPROFILER, or some other
* way to turn on whole-program profiling.
*/
int IsHeapProfilerRunning();
/* Stop heap profiling. Can be restarted again with HeapProfilerStart(),
* but the currently accumulated profiling information will be cleared.
*/
PERFTOOLS_DLL_DECL void HeapProfilerStop();
/* Dump a profile now - can be used for dumping at a hopefully
* quiescent state in your program, in order to more easily track down
* memory leaks. Will include the reason in the logged message
*/
PERFTOOLS_DLL_DECL void HeapProfilerDump(const char *reason);
/* Generate current heap profiling information.
* Returns an empty string when heap profiling is not active.
* The returned pointer is a '\0'-terminated string allocated using malloc()
* and should be free()-ed as soon as the caller does not need it anymore.
*/
PERFTOOLS_DLL_DECL char* GetHeapProfile();
#ifdef __cplusplus
} // extern "C"
#endif
#endif /* BASE_HEAP_PROFILER_H_ */