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 #ifdef _WIN32
  11 typedef void* platform_handle_t;
  12 #else
  13 typedef int platform_handle_t;
  14 #endif
  15
  16 /* We can't use libc's (f)printf because it would reenter in replace_malloc,
  17  * So use a custom and simplified version.  Only %p, %zu, %s and %% are
  18  * supported, %zu, %s, support width specifiers.
  19  *
  20  * /!\ This function used a fixed-size internal buffer. The caller is
  21  * expected to not use a format string that may overflow.
  22  * The aFd argument is a file descriptor on UNIX and a native win32 file
  23  * handle on Windows (from CreateFile). We can't use the windows POSIX
  24  * APIs is that they don't support O_APPEND in a multi-process-safe way,
  25  * while CreateFile does.
  26  */
  27 void FdPrintf(platform_handle_t aFd, const char* aFormat, ...)
  28 #ifdef __GNUC__
  29     __attribute__((format(printf, 2, 3)))
  30 #endif
  31     ;
  32
  33 #endif /* __FdPrintf_h__ */