Update the tcmalloc chromium branch to r144 (gperftools 2.0), and merge chromium-specific changes.

third_party/tcmalloc/chromium/src/google/profiler.h

 /* Copyright (c) 2005, Google Inc.
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  * 
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  * 
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * ---
- * Author: Sanjay Ghemawat
- *
- * Module for CPU profiling based on periodic pc-sampling.
- *
- * For full(er) information, see doc/cpuprofile.html
- *
- * This module is 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
- *       "PROFILE" 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 "ProfilerStart(filename)" and "ProfilerStop()".
- *
- *
- * (Note: if using linux 2.4 or earlier, only the main thread may be
- * profiled.)
- *
- * Use pprof to view the resulting profile output.
- *    % pprof <path_to_executable> <profile_file_name>
- *    % pprof --gv  <path_to_executable> <profile_file_name>
- *
- * These functions are thread-safe.
  */
 
-#ifndef BASE_PROFILER_H_
-#define BASE_PROFILER_H_
-
-#include <time.h>       /* For time_t */
-
-/* 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
-
-/* Profiler options, for use with ProfilerStartWithOptions.  To use:
- *
- *   struct ProfilerOptions options;
- *   memset(&options, 0, sizeof options);
- *
- * then fill in fields as needed.
- *
- * This structure is intended to be usable from C code, so no constructor
- * is provided to initialize it.  (Use memset as described above).
+/* The code has moved to gperftools/.  Use that include-directory for
+ * new code.
  */
-struct ProfilerOptions {
-  /* Filter function and argument.
-   *
-   * If filter_in_thread is not NULL, when a profiling tick is delivered
-   * the profiler will call:
-   *
-   *   (*filter_in_thread)(filter_in_thread_arg)
-   *
-   * If it returns nonzero, the sample will be included in the profile.
-   * Note that filter_in_thread runs in a signal handler, so must be
-   * async-signal-safe.
-   *
-   * A typical use would be to set up filter results for each thread
-   * in the system before starting the profiler, then to make
-   * filter_in_thread be a very simple function which retrieves those
-   * results in an async-signal-safe way.  Retrieval could be done
-   * using thread-specific data, or using a shared data structure that
-   * supports async-signal-safe lookups.
-   */
-  int (*filter_in_thread)(void *arg);
-  void *filter_in_thread_arg;
-};
-
-/* Start profiling and write profile info into fname.
- *
- * This is equivalent to calling ProfilerStartWithOptions(fname, NULL).
- */
-PERFTOOLS_DLL_DECL int ProfilerStart(const char* fname);
-
-/* Start profiling and write profile into fname.
- *
- * The profiler is configured using the options given by 'options'.
- * Options which are not specified are given default values.
- *
- * 'options' may be NULL, in which case all are given default values.
- *
- * Returns nonzero if profiling was started sucessfully, or zero else.
- */
-PERFTOOLS_DLL_DECL int ProfilerStartWithOptions(
-    const char *fname, const struct ProfilerOptions *options);
-
-/* Stop profiling. Can be started again with ProfilerStart(), but
- * the currently accumulated profiling data will be cleared.
- */
-PERFTOOLS_DLL_DECL void ProfilerStop();
-
-/* Flush any currently buffered profiling state to the profile file.
- * Has no effect if the profiler has not been started.
- */
-PERFTOOLS_DLL_DECL void ProfilerFlush();
-
-
-/* DEPRECATED: these functions were used to enable/disable profiling
- * in the current thread, but no longer do anything.
- */
-PERFTOOLS_DLL_DECL void ProfilerEnable();
-PERFTOOLS_DLL_DECL void ProfilerDisable();
-
-/* Returns nonzero if profile is currently enabled, zero if it's not. */
-PERFTOOLS_DLL_DECL int ProfilingIsEnabledForAllThreads();
-
-/* Routine for registering new threads with the profiler.
- */
-PERFTOOLS_DLL_DECL void ProfilerRegisterThread();
-
-/* Stores state about profiler's current status into "*state". */
-struct ProfilerState {
-  int    enabled;             /* Is profiling currently enabled? */
-  time_t start_time;          /* If enabled, when was profiling started? */
-  char   profile_name[1024];  /* Name of profile file being written, or '\0' */
-  int    samples_gathered;    /* Number of samples gathered so far (or 0) */
-};
-PERFTOOLS_DLL_DECL void ProfilerGetCurrentState(struct ProfilerState* state);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif
-
-#endif  /* BASE_PROFILER_H_ */
+#include <gperftools/profiler.h>