source/lib/posix/posix_aio.h

   1 /* Copyright (c) 2012 Wildfire Games
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining
   4  * a copy of this software and associated documentation files (the
   5  * "Software"), to deal in the Software without restriction, including
   6  * without limitation the rights to use, copy, modify, merge, publish,
   7  * distribute, sublicense, and/or sell copies of the Software, and to
   8  * permit persons to whom the Software is furnished to do so, subject to
   9  * the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included
  12  * in all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  15  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  16  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  17  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  18  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  19  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  20  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #ifndef INCLUDED_POSIX_AIO
  24 #define INCLUDED_POSIX_AIO
  25
  26 // despite the comment in wposix.h about not using Windows headers for
  27 // POSIX declarations, this one is harmless (no incompatible declarations)
  28 // and can safely be used on Windows as well.
  29 #include <fcntl.h>
  30
  31 #if OS_WIN
  32 # include "lib/sysdep/os/win/wposix/waio.h"
  33 #elif OS_ANDROID || OS_OPENBSD
  34 // Android doesn't provide aio.h. We don't actually use aio on Linuxes (see
  35 // CONFIG2_FILE_ENABLE_AIO) but we use its symbols and structs, so define
  36 // them here
  37 # if OS_OPENBSD
  38 // OpenBSD 5.1 (latest version at time of writing) has no struct sigevent defined,
  39 // so we do this here.
  40 struct sigevent
  41 {
  42         int sigev_notify;
  43         int sigev_signo;
  44         union sigval sigev_value;
  45         void (*sigev_notify_function)(union sigval);
  46         pthread_attr_t *sigev_notify_attributes;
  47 };
  48 # endif
  49 # define LIO_READ 0
  50 # define LIO_WRITE 1
  51 # define LIO_NOP 2
  52 struct aiocb
  53 {
  54         int aio_fildes;
  55         off_t aio_offset;
  56         volatile void* aio_buf;
  57         size_t aio_nbytes;
  58         int aio_reqprio;
  59         struct sigevent aio_sigevent;
  60         int aio_lio_opcode;
  61 };
  62 #else
  63 # include <aio.h>
  64 #endif
  65
  66 #include "lib/posix/posix_errno.h"      // for user convenience
  67
  68 #endif  // #ifndef INCLUDED_POSIX_AIO