Merge google-perftools r109 (the current contents of third_party/tcmalloc/vendor)

third_party/tcmalloc/chromium/src/windows/port.h

Index: third_party/tcmalloc/chromium/src/windows/port.h
===================================================================
--- third_party/tcmalloc/chromium/src/windows/port.h	(revision 87277)
+++ third_party/tcmalloc/chromium/src/windows/port.h	(working copy)
@@ -40,8 +40,8 @@
 #ifndef GOOGLE_BASE_WINDOWS_H_
 #define GOOGLE_BASE_WINDOWS_H_
 
-// You should never include this file directly, but always include it
-// from either config.h (MSVC) or mingw.h (MinGW/msys).
+/* You should never include this file directly, but always include it
+   from either config.h (MSVC) or mingw.h (MinGW/msys). */
 #if !defined(GOOGLE_PERFTOOLS_WINDOWS_CONFIG_H_) && \
     !defined(GOOGLE_PERFTOOLS_WINDOWS_MINGW_H_)
 # error "port.h should only be included from config.h or mingw.h"
@@ -54,22 +54,46 @@
 #endif
 #include <windows.h>
 #include <io.h>              /* because we so often use open/close/etc */
+#include <direct.h>          /* for _getcwd */
 #include <process.h>         /* for _getpid */
+#include <limits.h>          /* for PATH_MAX */
 #include <stdarg.h>          /* for va_list */
 #include <stdio.h>           /* need this to override stdio's (v)snprintf */
+#include <sys/types.h>       /* for _off_t */
+#include <assert.h>
+#include <stdlib.h>          /* for rand, srand, _strtoxxx */
 
-// 4018: signed/unsigned mismatch is common (and ok for signed_i < unsigned_i)
-// 4244: otherwise we get problems when substracting two size_t's to an int
-// 4288: VC++7 gets confused when a var is defined in a loop and then after it
-// 4267: too many false positives for "conversion gives possible data loss"
-// 4290: it's ok windows ignores the "throw" directive
-// 4996: Yes, we're ok using "unsafe" functions like vsnprintf and getenv()
+/*
+ * 4018: signed/unsigned mismatch is common (and ok for signed_i < unsigned_i)
+ * 4244: otherwise we get problems when substracting two size_t's to an int
+ * 4288: VC++7 gets confused when a var is defined in a loop and then after it
+ * 4267: too many false positives for "conversion gives possible data loss"
+ * 4290: it's ok windows ignores the "throw" directive
+ * 4996: Yes, we're ok using "unsafe" functions like vsnprintf and getenv()
+ */
 #ifdef _MSC_VER
 #pragma warning(disable:4018 4244 4288 4267 4290 4996)
 #endif
 
-// ----------------------------------- BASIC TYPES
+#ifndef __cplusplus
+/* MSVC does not support C99 */
+# if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L
+#  ifdef _MSC_VER
+#    define inline __inline
+#  else
+#    define inline static
+#  endif
+# endif
+#endif
 
+#ifdef __cplusplus
+# define EXTERN_C  extern "C"
+#else
+# define EXTERN_C  extern
+#endif
+
+/* ----------------------------------- BASIC TYPES */
+
 #ifndef HAVE_STDINT_H
 #ifndef HAVE___INT64    /* we need to have all the __intX names */
 # error  Do not know how to set up type aliases.  Edit port.h for your system.
@@ -83,53 +107,78 @@
 typedef unsigned __int16 uint16_t;
 typedef unsigned __int32 uint32_t;
 typedef unsigned __int64 uint64_t;
-#endif  // #ifndef HAVE_STDINT_H
+#endif  /* #ifndef HAVE_STDINT_H */
 
-// I guess MSVC's <types.h> doesn't include ssize_t by default?
+/* I guess MSVC's <types.h> doesn't include ssize_t by default? */
 #ifdef _MSC_VER
 typedef intptr_t ssize_t;
 #endif
 
-// ----------------------------------- THREADS
+/* ----------------------------------- THREADS */
 
-#ifndef HAVE_PTHREAD   // not true for MSVC, but may be true for MSYS
+#ifndef HAVE_PTHREAD   /* not true for MSVC, but may be true for MSYS */
 typedef DWORD pthread_t;
 typedef DWORD pthread_key_t;
 typedef LONG pthread_once_t;
-enum { PTHREAD_ONCE_INIT = 0 };   // important that this be 0! for SpinLock
-#define pthread_self  GetCurrentThreadId
-#define pthread_equal(pthread_t_1, pthread_t_2)  ((pthread_t_1)==(pthread_t_2))
+enum { PTHREAD_ONCE_INIT = 0 };   /* important that this be 0! for SpinLock */
 
+inline pthread_t pthread_self(void) {
+  return GetCurrentThreadId();
+}
+
 #ifdef __cplusplus
-// This replaces maybe_threads.{h,cc}
-extern pthread_key_t PthreadKeyCreate(void (*destr_fn)(void*));  // in port.cc
-#define perftools_pthread_key_create(pkey, destr_fn)  \
-  *(pkey) = PthreadKeyCreate(destr_fn)
+inline bool pthread_equal(pthread_t left, pthread_t right) {
+  return left == right;
+}
+
+/* This replaces maybe_threads.{h,cc} */
+EXTERN_C pthread_key_t PthreadKeyCreate(void (*destr_fn)(void*));  /* port.cc */
+
+inline int perftools_pthread_key_create(pthread_key_t *pkey,
+                                        void (*destructor)(void*)) {
+  pthread_key_t key = PthreadKeyCreate(destructor);
+  if (key != TLS_OUT_OF_INDEXES) {
+    *(pkey) = key;
+    return 0;
+  } else {
+    return GetLastError();
+  }
+}
+
 inline void* perftools_pthread_getspecific(DWORD key) {
   DWORD err = GetLastError();
   void* rv = TlsGetValue(key);
   if (err) SetLastError(err);
   return rv;
 }
-#define perftools_pthread_setspecific(key, val) \
-  TlsSetValue((key), (val))
-// NOTE: this is Win2K and later.  For Win98 we could use a CRITICAL_SECTION...
-#define perftools_pthread_once(once, init)  do {                \
-  if (InterlockedCompareExchange(once, 1, 0) == 0) (init)();    \
-} while (0)
-#endif  // __cplusplus
-#endif  // HAVE_PTHREAD
 
-// __declspec(thread) isn't usable in a dll opened via LoadLibrary().
-// But it doesn't work to LoadLibrary() us anyway, because of all the
-// things we need to do before main()!  So this kind of TLS is safe for us.
+inline int perftools_pthread_setspecific(pthread_key_t key, const void *value) {
+  if (TlsSetValue(key, (LPVOID)value))
+    return 0;
+  else
+    return GetLastError();
+}
+
+EXTERN_C int perftools_pthread_once(pthread_once_t *once_control,
+                                    void (*init_routine)(void));
+
+#endif  /* __cplusplus */
+#endif  /* HAVE_PTHREAD */
+
+/*
+ * __declspec(thread) isn't usable in a dll opened via LoadLibrary().
+ * But it doesn't work to LoadLibrary() us anyway, because of all the
+ * things we need to do before main()!  So this kind of TLS is safe for us.
+ */
 #define __thread __declspec(thread)
 
-// This code is obsolete, but I keep it around in case we are ever in
-// an environment where we can't or don't want to use google spinlocks
-// (from base/spinlock.{h,cc}).  In that case, uncommenting this out,
-// and removing spinlock.cc from the build, should be enough to revert
-// back to using native spinlocks.
+/*
+ * This code is obsolete, but I keep it around in case we are ever in
+ * an environment where we can't or don't want to use google spinlocks
+ * (from base/spinlock.{h,cc}).  In that case, uncommenting this out,
+ * and removing spinlock.cc from the build, should be enough to revert
+ * back to using native spinlocks.
+ */
 #if 0
 // Windows uses a spinlock internally for its mutexes, making our life easy!
 // However, the Windows spinlock must always be initialized, making life hard,
@@ -197,52 +246,81 @@
 // This keeps us from using base/spinlock.h's implementation of SpinLock.
 #define BASE_SPINLOCK_H_ 1
 
-#endif  // #if 0
+#endif  /* #if 0 */
 
-// This replaces testutil.{h,cc}
-extern PERFTOOLS_DLL_DECL void RunInThread(void (*fn)());
-extern PERFTOOLS_DLL_DECL void RunManyInThread(void (*fn)(), int count);
-extern PERFTOOLS_DLL_DECL void RunManyInThreadWithId(void (*fn)(int), int count,
-                                                     int stacksize);
+/* ----------------------------------- MMAP and other memory allocation */
 
-
-// ----------------------------------- MMAP and other memory allocation
-
-#ifndef HAVE_MMAP   // not true for MSVC, but may be true for msys
+#ifndef HAVE_MMAP   /* not true for MSVC, but may be true for msys */
 #define MAP_FAILED  0
-#define MREMAP_FIXED  2  // the value in linux, though it doesn't really matter
-// These, when combined with the mmap invariants below, yield the proper action
+#define MREMAP_FIXED  2  /* the value in linux, though it doesn't really matter */
+/* These, when combined with the mmap invariants below, yield the proper action */
 #define PROT_READ      PAGE_READWRITE
 #define PROT_WRITE     PAGE_READWRITE
 #define MAP_ANONYMOUS  MEM_RESERVE
 #define MAP_PRIVATE    MEM_COMMIT
-#define MAP_SHARED     MEM_RESERVE   // value of this #define is 100% arbitrary
+#define MAP_SHARED     MEM_RESERVE   /* value of this #define is 100% arbitrary */
 
-// VirtualAlloc is only a replacement for mmap when certain invariants are kept
-#define mmap(start, length, prot, flags, fd, offset)                          \
-  ( (start) == NULL && (fd) == -1 && (offset) == 0 &&                         \
-    (prot) == (PROT_READ|PROT_WRITE) && (flags) == (MAP_PRIVATE|MAP_ANONYMOUS)\
-      ? VirtualAlloc(0, length, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE)     \
-      : NULL )
+#if __STDC__
+typedef _off_t off_t;
+#endif
 
-#define munmap(start, length)   (VirtualFree(start, 0, MEM_RELEASE) ? 0 : -1)
-#endif  // HAVE_MMAP
+/* VirtualAlloc only replaces for mmap when certain invariants are kept. */
+inline void *mmap(void *addr, size_t length, int prot, int flags,
+                  int fd, off_t offset) {
+  if (addr == NULL && fd == -1 && offset == 0 &&
+      prot == (PROT_READ|PROT_WRITE) && flags == (MAP_PRIVATE|MAP_ANONYMOUS)) {
+    return VirtualAlloc(0, length, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
+  } else {
+    return NULL;
+  }
+}
 
-// We could maybe use VirtualAlloc for sbrk as well, but no need
-#define sbrk(increment)  ( (void*)-1 )   // sbrk returns -1 on failure
+inline int munmap(void *addr, size_t length) {
+  return VirtualFree(addr, 0, MEM_RELEASE) ? 0 : -1;
+}
+#endif  /* HAVE_MMAP */
 
+/* We could maybe use VirtualAlloc for sbrk as well, but no need */
+inline void *sbrk(intptr_t increment) {
+  // sbrk returns -1 on failure
+  return (void*)-1;
+}
 
-// ----------------------------------- STRING ROUTINES
 
-// We can't just use _vsnprintf and _snprintf as drop-in-replacements,
-// because they don't always NUL-terminate. :-(  We also can't use the
-// name vsnprintf, since windows defines that (but not snprintf (!)).
-extern PERFTOOLS_DLL_DECL int snprintf(char *str, size_t size,
-                                       const char *format, ...);
-extern PERFTOOLS_DLL_DECL int safe_vsnprintf(char *str, size_t size,
-                                             const char *format, va_list ap);
-#define vsnprintf(str, size, format, ap)  safe_vsnprintf(str, size, format, ap)
+/* ----------------------------------- STRING ROUTINES */
 
+/*
+ * We can't just use _vsnprintf and _snprintf as drop-in-replacements,
+ * because they don't always NUL-terminate. :-(  We also can't use the
+ * name vsnprintf, since windows defines that (but not snprintf (!)).
+ */
+#if defined(_MSC_VER) && _MSC_VER >= 1400
+/* We can use safe CRT functions, which the required functionality */
+inline int perftools_vsnprintf(char *str, size_t size, const char *format,
+                               va_list ap) {
+  return vsnprintf_s(str, size, _TRUNCATE, format, ap);
+}
+#else
+inline int perftools_vsnprintf(char *str, size_t size, const char *format,
+                               va_list ap) {
+  if (size == 0)        /* not even room for a \0? */
+    return -1;        /* not what C99 says to do, but what windows does */
+  str[size-1] = '\0';
+  return _vsnprintf(str, size-1, format, ap);
+}
+#endif
+
+#ifndef HAVE_SNPRINTF
+inline int snprintf(char *str, size_t size, const char *format, ...) {
+  va_list ap;
+  int r;
+  va_start(ap, format);
+  r = perftools_vsnprintf(str, size, format, ap);
+  va_end(ap);
+  return r;
+}
+#endif
+
 #define PRIx64  "I64x"
 #define SCNx64  "I64x"
 #define PRId64  "I64d"
@@ -256,79 +334,132 @@
 # define PRIxPTR "lx"
 #endif
 
-// ----------------------------------- FILE IO
+/* ----------------------------------- FILE IO */
+
 #ifndef PATH_MAX
 #define PATH_MAX 1024
 #endif
 #ifndef __MINGW32__
 enum { STDIN_FILENO = 0, STDOUT_FILENO = 1, STDERR_FILENO = 2 };
 #endif
-#define getcwd    _getcwd
-#define access    _access
-#define open      _open
-#define read      _read
-#define write     _write
-#define lseek     _lseek
-#define close     _close
-#define popen     _popen
-#define pclose    _pclose
-#define mkdir(dirname, mode)  _mkdir(dirname)
 #ifndef O_RDONLY
 #define O_RDONLY  _O_RDONLY
 #endif
 
-// ----------------------------------- SYSTEM/PROCESS
+#if __STDC__ && !defined(__MINGW32__)
+/* These functions are considered non-standard */
+inline int access(const char *pathname, int mode) {
+  return _access(pathname, mode);
+}
+inline int open(const char *pathname, int flags, int mode = 0) {
+  return _open(pathname, flags, mode);
+}
+inline int close(int fd) {
+  return _close(fd);
+}
+inline ssize_t read(int fd, void *buf, size_t count) {
+  return _read(fd, buf, count);
+}
+inline ssize_t write(int fd, const void *buf, size_t count) {
+  return _write(fd, buf, count);
+}
+inline off_t lseek(int fd, off_t offset, int whence) {
+  return _lseek(fd, offset, whence);
+}
+inline char *getcwd(char *buf, size_t size) {
+  return _getcwd(buf, size);
+}
+inline int mkdir(const char *pathname, int) {
+  return _mkdir(pathname);
+}
+#endif
+
+inline FILE *popen(const char *command, const char *type) {
+  return _popen(command, type);
+}
+inline int pclose(FILE *stream) {
+  return _pclose(stream);
+}
+
+EXTERN_C PERFTOOLS_DLL_DECL void WriteToStderr(const char* buf, int len);
+
+/* ----------------------------------- SYSTEM/PROCESS */
+
 typedef int pid_t;
-#define getpid  _getpid
-#define getppid() (0)
+#if __STDC__
+inline pid_t getpid(void) { return _getpid(); }
+#endif
+inline pid_t getppid(void) { return 0; }
 
-// Handle case when poll is used to simulate sleep.
-#define poll(r, w, t) \
-  do {                \
-    assert(r == 0);   \
-    assert(w == 0);   \
-    Sleep(t);         \
-  } while(0)
+/* Handle case when poll is used to simulate sleep. */
+inline int poll(struct pollfd* fds, int nfds, int timeout) {
+  assert(fds == NULL);
+  assert(nfds == 0);
+  Sleep(timeout);
+  return 0;
+}
 
-extern PERFTOOLS_DLL_DECL int getpagesize();   // in port.cc
+EXTERN_C int getpagesize();   /* in port.cc */
 
-// ----------------------------------- OTHER
+/* ----------------------------------- OTHER */
 
-#define srandom  srand
-#define random   rand
-#define sleep(t) Sleep(t * 1000)
+inline void srandom(unsigned int seed) { srand(seed); }
+inline long random(void) { return rand(); }
+inline unsigned int sleep(unsigned int seconds) {
+  Sleep(seconds * 1000);
+  return 0;
+}
 
 struct timespec {
   int tv_sec;
   int tv_nsec;
 };
 
-#define nanosleep(tm_ptr, ignored)  \
-  Sleep((tm_ptr)->tv_sec * 1000 + (tm_ptr)->tv_nsec / 1000000)
+inline int nanosleep(const struct timespec *req, struct timespec *rem) {
+  Sleep(req->tv_sec * 1000 + req->tv_nsec / 1000000);
+  return 0;
+}
 
 #ifndef __MINGW32__
-#define strtoq   _strtoi64
-#define strtouq  _strtoui64
-#define strtoll  _strtoi64
-#define strtoull _strtoui64
-#define atoll    _atoi64
+inline long long int strtoll(const char *nptr, char **endptr, int base) {
+    return _strtoi64(nptr, endptr, base);
+}
+inline unsigned long long int strtoull(const char *nptr, char **endptr,
+                                       int base) {
+    return _strtoui64(nptr, endptr, base);
+}
+inline long long int strtoq(const char *nptr, char **endptr, int base) {
+    return _strtoi64(nptr, endptr, base);
+}
+inline unsigned long long int strtouq(const char *nptr, char **endptr,
+                                      int base) {
+    return _strtoui64(nptr, endptr, base);
+}
+inline long long atoll(const char *nptr) {
+  return _atoi64(nptr);
+}
 #endif
 
 #define __THROW throw()
 
-// ----------------------------------- TCMALLOC-SPECIFIC
+/* ----------------------------------- TCMALLOC-SPECIFIC */
 
-// tcmalloc.cc calls this so we can patch VirtualAlloc() et al.
-extern PERFTOOLS_DLL_DECL void PatchWindowsFunctions();
+/* tcmalloc.cc calls this so we can patch VirtualAlloc() et al. */
+extern void PatchWindowsFunctions();
 
 // ----------------------------------- BUILD-SPECIFIC
 
-// windows/port.h defines compatibility APIs for several .h files, which
-// we therefore shouldn't be #including directly.  This hack keeps us from
-// doing so.  TODO(csilvers): do something more principled.
+/*
+ * windows/port.h defines compatibility APIs for several .h files, which
+ * we therefore shouldn't be #including directly.  This hack keeps us from
+ * doing so.  TODO(csilvers): do something more principled.
+ */
 #define GOOGLE_MAYBE_THREADS_H_ 1
 
 
 #endif  /* _WIN32 */
 
+#undef inline
+#undef EXTERN_C
+
 #endif  /* GOOGLE_BASE_WINDOWS_H_ */