release/src/router/mysql/storage/innodb_plugin/include/os0proc.h

   1 /*****************************************************************************
   2
   3 Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved.
   4
   5 This program is free software; you can redistribute it and/or modify it under
   6 the terms of the GNU General Public License as published by the Free Software
   7 Foundation; version 2 of the License.
   8
   9 This program is distributed in the hope that it will be useful, but WITHOUT
  10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  11 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
  12
  13 You should have received a copy of the GNU General Public License along with
  14 this program; if not, write to the Free Software Foundation, Inc.,
  15 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  16
  17 *****************************************************************************/
  18
  19 /**************************************************//**
  20 @file include/os0proc.h
  21 The interface to the operating system
  22 process control primitives
  23
  24 Created 9/30/1995 Heikki Tuuri
  25 *******************************************************/
  26
  27 #ifndef os0proc_h
  28 #define os0proc_h
  29
  30 #include "univ.i"
  31
  32 #ifdef UNIV_LINUX
  33 #include <sys/ipc.h>
  34 #include <sys/shm.h>
  35 #endif
  36
  37 typedef void*                   os_process_t;
  38 typedef unsigned long int       os_process_id_t;
  39
  40 extern ibool os_use_large_pages;
  41 /* Large page size. This may be a boot-time option on some platforms */
  42 extern ulint os_large_page_size;
  43
  44 /****************************************************************//**
  45 Converts the current process id to a number. It is not guaranteed that the
  46 number is unique. In Linux returns the 'process number' of the current
  47 thread. That number is the same as one sees in 'top', for example. In Linux
  48 the thread id is not the same as one sees in 'top'.
  49 @return process id as a number */
  50 UNIV_INTERN
  51 ulint
  52 os_proc_get_number(void);
  53 /*====================*/
  54 /****************************************************************//**
  55 Allocates large pages memory.
  56 @return allocated memory */
  57 UNIV_INTERN
  58 void*
  59 os_mem_alloc_large(
  60 /*===============*/
  61         ulint*  n);                     /*!< in/out: number of bytes */
  62 /****************************************************************//**
  63 Frees large pages memory. */
  64 UNIV_INTERN
  65 void
  66 os_mem_free_large(
  67 /*==============*/
  68         void    *ptr,                   /*!< in: pointer returned by
  69                                         os_mem_alloc_large() */
  70         ulint   size);                  /*!< in: size returned by
  71                                         os_mem_alloc_large() */
  72
  73 #ifndef UNIV_NONINL
  74 #include "os0proc.ic"
  75 #endif
  76
  77 #endif