diff options
Diffstat (limited to 'sql/my_lock.c')
| -rw-r--r-- | sql/my_lock.c | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/sql/my_lock.c b/sql/my_lock.c deleted file mode 100644 index 276259b106a..00000000000 --- a/sql/my_lock.c +++ /dev/null @@ -1,91 +0,0 @@ -/* Copyright (C) 2000-2003 MySQL AB - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; version 2 of the License. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ - -#if defined(__NETWARE__) -#include "../mysys/my_lock.c" -#else - -#undef MAP_TO_USE_RAID /* Avoid RAID mappings */ -#include <my_global.h> -#include <my_sys.h> -#include <mysys_err.h> -#include <my_pthread.h> -#include <thr_alarm.h> -#include <errno.h> - -/** - @breif Lock a part of a file - - @note - This works like mysys/my_lock.c, with the exception that this function - uses the thr_alarm() to break long lock statements. - (mysys can't use thr_alarm() as by default the alarm handling doesn't - exists) -*/ - -int my_lock(File fd,int locktype,my_off_t start,my_off_t length,myf MyFlags) -{ - thr_alarm_t alarmed; - ALARM alarm_buff; - uint wait_for_alarm; - struct flock m_lock; - DBUG_ENTER("my_lock"); - DBUG_PRINT("my",("Fd: %d Op: %d start: %ld Length: %ld MyFlags: %d", - fd,locktype,(ulong) start,(ulong) length,MyFlags)); - if (my_disable_locking && ! (MyFlags & MY_FORCE_LOCK)) - DBUG_RETURN(0); /* purecov: inspected */ - - m_lock.l_type=(short) locktype; - m_lock.l_whence=0L; - m_lock.l_start=(long) start; - m_lock.l_len=(long) length; - if (fcntl(fd,F_SETLK,&m_lock) != -1) /* Check if we can lock */ - DBUG_RETURN(0); /* Ok, file locked */ - - if (!(MyFlags & MY_NO_WAIT)) - { - wait_for_alarm= (MyFlags & MY_SHORT_WAIT ? MY_HOW_OFTEN_TO_ALARM : - (uint) 12*60*60); - DBUG_PRINT("info",("Was locked, trying with alarm")); - if (!thr_alarm(&alarmed,wait_for_alarm,&alarm_buff)) - { - int value; - while ((value=fcntl(fd,F_SETLKW,&m_lock)) && !thr_got_alarm(&alarmed) && - errno == EINTR) ; - thr_end_alarm(&alarmed); - if (value != -1) - DBUG_RETURN(0); - } - else - { - errno=EINTR; - } - } - if (errno == EINTR || errno == EACCES) - my_errno=EAGAIN; /* Easier to check for this */ - else - my_errno=errno; - - if (MyFlags & MY_WME) - { - if (locktype == F_UNLCK) - my_error(EE_CANTUNLOCK,MYF(ME_BELL+ME_WAITTANG),errno); - else - my_error(EE_CANTLOCK,MYF(ME_BELL+ME_WAITTANG),errno); - } - DBUG_PRINT("error",("errno: %d",errno)); - DBUG_RETURN(-1); -} -#endif |