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ffa8c4cfcc
support ha_innodb.so as a dynamic plugin. * remove obsolete *,innodb_plugin.rdiff files * s/--plugin-load=/--plugin-load-add=/ * MYSQL_PLUGIN_IMPORT glob_hostname[] * use my_error instead of push_warning_printf(ER_DEFAULT) * don't use tdc_size and tc_size in a module update test cases (XtraDB is 5.6.14, InnoDB is 5.6.10) * copy new tests over * disable some tests for (old) InnoDB * delete XtraDB tests that no longer apply small compatibility changes: * s/HTON_EXTENDED_KEYS/HTON_SUPPORTS_EXTENDED_KEYS/ * revert unnecessary InnoDB changes to make it a bit closer to the upstream fix XtraDB to compile on Windows (both as a static and a dynamic plugin) disable XtraDB on Windows (deadlocks) and where no atomic ops are available (e.g. CentOS 5) storage/innobase/handler/ha_innodb.cc: revert few unnecessary changes to make it a bit closer to the original InnoDB storage/innobase/include/univ.i: correct the version to match what it was merged from
189 lines
6.1 KiB
C
189 lines
6.1 KiB
C
/*****************************************************************************
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Copyright (c) 1995, 2011, Oracle and/or its affiliates. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/os0thread.h
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The interface to the operating system
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process and thread control primitives
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Created 9/8/1995 Heikki Tuuri
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*******************************************************/
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#ifndef os0thread_h
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#define os0thread_h
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#include "univ.i"
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#ifdef UNIV_LINUX
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#include <sys/types.h>
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#endif
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/* Maximum number of threads which can be created in the program;
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this is also the size of the wait slot array for MySQL threads which
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can wait inside InnoDB */
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#define OS_THREAD_MAX_N srv_max_n_threads
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/* Possible fixed priorities for threads */
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#define OS_THREAD_PRIORITY_NONE 100
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#define OS_THREAD_PRIORITY_BACKGROUND 1
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#define OS_THREAD_PRIORITY_NORMAL 2
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#define OS_THREAD_PRIORITY_ABOVE_NORMAL 3
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#ifdef __WIN__
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typedef void* os_thread_t;
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typedef DWORD os_thread_id_t; /*!< In Windows the thread id
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is an unsigned long int */
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typedef os_thread_id_t os_tid_t;
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extern "C" {
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typedef LPTHREAD_START_ROUTINE os_thread_func_t;
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}
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/** Macro for specifying a Windows thread start function. */
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#define DECLARE_THREAD(func) WINAPI func
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/** Required to get around a build error on Windows. Even though our functions
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are defined/declared as WINAPI f(LPVOID a); the compiler complains that they
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are defined as: os_thread_ret_t (__cdecl*)(void*). Because our functions
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don't access the arguments and don't return any value, we should be safe. */
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#define os_thread_create(f,a,i) \
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os_thread_create_func(reinterpret_cast<os_thread_func_t>(f), a, i)
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#else
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typedef pthread_t os_thread_t;
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typedef os_thread_t os_thread_id_t; /*!< In Unix we use the thread
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handle itself as the id of
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the thread */
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#ifdef UNIV_LINUX
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typedef pid_t os_tid_t; /*!< An alias for pid_t on
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Linux, where setpriority()
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accepts thread id of this type
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and not pthread_t */
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#else
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typedef os_thread_id_t os_tid_t;
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#endif
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extern "C" { typedef void* (*os_thread_func_t)(void*); }
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/** Macro for specifying a POSIX thread start function. */
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#define DECLARE_THREAD(func) func
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#define os_thread_create(f,a,i) os_thread_create_func(f, a, i)
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#endif /* __WIN__ */
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/* Define a function pointer type to use in a typecast */
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typedef void* (*os_posix_f_t) (void*);
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#ifdef HAVE_PSI_INTERFACE
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/* Define for performance schema registration key */
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typedef unsigned int mysql_pfs_key_t;
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#endif
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/***************************************************************//**
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Compares two thread ids for equality.
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@return TRUE if equal */
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UNIV_INTERN
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ibool
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os_thread_eq(
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/*=========*/
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os_thread_id_t a, /*!< in: OS thread or thread id */
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os_thread_id_t b); /*!< in: OS thread or thread id */
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/****************************************************************//**
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Converts an OS thread id to a ulint. It is NOT guaranteed that the ulint is
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unique for the thread though!
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@return thread identifier as a number */
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UNIV_INTERN
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ulint
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os_thread_pf(
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/*=========*/
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os_thread_id_t a); /*!< in: OS thread identifier */
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/****************************************************************//**
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Creates a new thread of execution. The execution starts from
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the function given. The start function takes a void* parameter
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and returns a ulint.
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NOTE: We count the number of threads in os_thread_exit(). A created
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thread should always use that to exit and not use return() to exit.
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@return handle to the thread */
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UNIV_INTERN
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os_thread_t
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os_thread_create_func(
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/*==================*/
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os_thread_func_t func, /*!< in: pointer to function
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from which to start */
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void* arg, /*!< in: argument to start
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function */
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os_thread_id_t* thread_id); /*!< out: id of the created
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thread, or NULL */
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/*****************************************************************//**
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Exits the current thread. */
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UNIV_INTERN
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void
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os_thread_exit(
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/*===========*/
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void* exit_value) /*!< in: exit value; in Windows this void*
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is cast as a DWORD */
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UNIV_COLD __attribute__((noreturn));
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/*****************************************************************//**
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Returns the thread identifier of current thread.
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@return current thread identifier */
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UNIV_INTERN
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os_thread_id_t
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os_thread_get_curr_id(void);
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/*========================*/
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/*****************************************************************//**
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Returns the system-specific thread identifier of current thread. On Linux,
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returns tid. On other systems currently returns os_thread_get_curr_id().
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@return current thread identifier */
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UNIV_INTERN
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os_tid_t
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os_thread_get_tid(void);
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/*=====================*/
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/*****************************************************************//**
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Advises the os to give up remainder of the thread's time slice. */
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UNIV_INTERN
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void
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os_thread_yield(void);
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/*=================*/
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/*****************************************************************//**
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The thread sleeps at least the time given in microseconds. */
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UNIV_INTERN
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void
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os_thread_sleep(
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/*============*/
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ulint tm); /*!< in: time in microseconds */
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/*****************************************************************//**
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Set relative scheduling priority for a given thread on Linux. Currently a
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no-op on other systems.
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@return An actual thread priority after the update */
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UNIV_INTERN
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ulint
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os_thread_set_priority(
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/*===================*/
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os_tid_t thread_id, /*!< in: thread id */
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ulint relative_priority); /*!< in: system-specific
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priority value */
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#ifndef UNIV_NONINL
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#include "os0thread.ic"
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#endif
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#endif
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