memory/build/FdPrintf.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef __FdPrintf_h__
   8 #define __FdPrintf_h__
   9
  10 /* We can't use libc's (f)printf because it would reenter in replace_malloc,
  11  * So use a custom and simplified version.  Only %p, %zu, %s and %% are
  12  * supported, %zu, %s, support width specifiers.
  13  *
  14  * /!\ This function used a fixed-size internal buffer. The caller is
  15  * expected to not use a format string that may overflow.
  16  * The aFd argument is a file descriptor on UNIX and a native win32 file
  17  * handle on Windows (from CreateFile). We can't use the windows POSIX
  18  * APIs is that they don't support O_APPEND in a multi-process-safe way,
  19  * while CreateFile does.
  20  */
  21 void FdPrintf(intptr_t aFd, const char* aFormat, ...)
  22 #ifdef __GNUC__
  23     __attribute__((format(printf, 2, 3)))
  24 #endif
  25     ;
  26
  27 #endif /* __FdPrintf_h__ */