/* Copyright (c) 2008-2009, 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.
 * * 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: Kostya Serebryany
 */

#ifdef _MSC_VER
# include <windows.h>
#endif

#ifdef __cplusplus
# error "This file should be built as pure C to avoid name mangling"
#endif

#include <stdlib.h>
#include <string.h>

#include "dynamic_annotations.h"

/* Each function is empty and called (via a macro) only in debug mode.
 The arguments are captured by dynamic tools at runtime. */

#if DYNAMIC_ANNOTATIONS_ENABLED == 1

void AnnotateRWLockCreate(const char *file, int line,
 const volatile void *lock){}
void AnnotateRWLockDestroy(const char *file, int line,
 const volatile void *lock){}
void AnnotateRWLockAcquired(const char *file, int line,
 const volatile void *lock, long is_w){}
void AnnotateRWLockReleased(const char *file, int line,
 const volatile void *lock, long is_w){}
void AnnotateBarrierInit(const char *file, int line,
 const volatile void *barrier, long count,
 long reinitialization_allowed) {}
void AnnotateBarrierWaitBefore(const char *file, int line,
 const volatile void *barrier) {}
void AnnotateBarrierWaitAfter(const char *file, int line,
 const volatile void *barrier) {}
void AnnotateBarrierDestroy(const char *file, int line,
 const volatile void *barrier) {}

void AnnotateCondVarWait(const char *file, int line,
 const volatile void *cv,
 const volatile void *lock){}
void AnnotateCondVarSignal(const char *file, int line,
 const volatile void *cv){}
void AnnotateCondVarSignalAll(const char *file, int line,
 const volatile void *cv){}
void AnnotatePublishMemoryRange(const char *file, int line,
 const volatile void *address,
 long size){}
void AnnotateUnpublishMemoryRange(const char *file, int line,
 const volatile void *address,
 long size){}
void AnnotatePCQCreate(const char *file, int line,
 const volatile void *pcq){}
void AnnotatePCQDestroy(const char *file, int line,
 const volatile void *pcq){}
void AnnotatePCQPut(const char *file, int line,
 const volatile void *pcq){}
void AnnotatePCQGet(const char *file, int line,
 const volatile void *pcq){}
void AnnotateNewMemory(const char *file, int line,
 const volatile void *mem,
 long size){}
void AnnotateExpectRace(const char *file, int line,
 const volatile void *mem,
 const char *description){}
void AnnotateBenignRace(const char *file, int line,
 const volatile void *mem,
 const char *description){}
void AnnotateBenignRaceSized(const char *file, int line,
 const volatile void *mem,
 long size,
 const char *description) {}
void AnnotateMutexIsUsedAsCondVar(const char *file, int line,
 const volatile void *mu){}
void AnnotateTraceMemory(const char *file, int line,
 const volatile void *arg){}
void AnnotateThreadName(const char *file, int line,
 const char *name){}
void AnnotateIgnoreReadsBegin(const char *file, int line){}
void AnnotateIgnoreReadsEnd(const char *file, int line){}
void AnnotateIgnoreWritesBegin(const char *file, int line){}
void AnnotateIgnoreWritesEnd(const char *file, int line){}
void AnnotateIgnoreSyncBegin(const char *file, int line){}
void AnnotateIgnoreSyncEnd(const char *file, int line){}
void AnnotateEnableRaceDetection(const char *file, int line, int enable){}
void AnnotateNoOp(const char *file, int line,
 const volatile void *arg){}
void AnnotateFlushState(const char *file, int line){}

static int GetRunningOnValgrind(void) {
#ifdef RUNNING_ON_VALGRIND
 if (RUNNING_ON_VALGRIND) return 1;
#endif

#ifndef _MSC_VER
 const char *running_on_valgrind_str = getenv("RUNNING_ON_VALGRIND");
 if (running_on_valgrind_str) {
 return strcmp(running_on_valgrind_str, "0") != 0;
 }
#else
 /* Visual Studio issues warnings if we use getenv,
 * so we use GetEnvironmentVariableA instead.
 */
 char value[100] = "1";
 int res = GetEnvironmentVariableA("RUNNING_ON_VALGRIND",
 value, sizeof(value));
 /* value will remain "1" if res == 0 or res >= sizeof(value). The latter
 * can happen only if the given value is long, in this case it can't be "0".
 */
 if (res > 0 && !strcmp(value, "0"))
 return 1;
#endif
 return 0;
}

/* See the comments in dynamic_annotations.h */
int RunningOnValgrind(void) {
 static volatile int running_on_valgrind = -1;
 /* C doesn't have thread-safe initialization of statics, and we
 don't want to depend on pthread_once here, so hack it. */
 int local_running_on_valgrind = running_on_valgrind;
 if (local_running_on_valgrind == -1)
 running_on_valgrind = local_running_on_valgrind = GetRunningOnValgrind();
 return local_running_on_valgrind;
}

#endif /* DYNAMIC_ANNOTATIONS_ENABLED == 1 */