diff options
Diffstat (limited to 'deps/mysqllite/mysys/my_lockmem.c')
-rw-r--r-- | deps/mysqllite/mysys/my_lockmem.c | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/deps/mysqllite/mysys/my_lockmem.c b/deps/mysqllite/mysys/my_lockmem.c deleted file mode 100644 index a37db6b208..0000000000 --- a/deps/mysqllite/mysys/my_lockmem.c +++ /dev/null @@ -1,98 +0,0 @@ -/* Copyright (C) 2000 MySQL AB, 2008-2009 Sun Microsystems, Inc - - 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 */ - -/* Alloc a block of locked memory */ - -#include "mysys_priv.h" -#include "mysys_err.h" -#include <my_list.h> - -#ifdef HAVE_MLOCK -#include <sys/mman.h> - -struct st_mem_list -{ - LIST list; - uchar *page; - uint size; -}; - -LIST *mem_list; - -uchar *my_malloc_lock(uint size,myf MyFlags) -{ - int success; - uint pagesize=sysconf(_SC_PAGESIZE); - uchar *ptr; - struct st_mem_list *element; - DBUG_ENTER("my_malloc_lock"); - - size=((size-1) & ~(pagesize-1))+pagesize; - if (!(ptr=memalign(pagesize,size))) - { - if (MyFlags & (MY_FAE+MY_WME)) - my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ME_WAITTANG),size); - DBUG_RETURN(0); - } - success = mlock((uchar*) ptr,size); - if (success != 0 && geteuid() == 0) - { - DBUG_PRINT("warning",("Failed to lock memory. errno %d\n", - errno)); - fprintf(stderr, "Warning: Failed to lock memory. errno %d\n", - errno); - } - else - { - /* Add block in a list for munlock */ - if (!(element=(struct st_mem_list*) my_malloc(sizeof(*element),MyFlags))) - { - (void) munlock((uchar*) ptr,size); - free(ptr); - DBUG_RETURN(0); - } - element->list.data=(uchar*) element; - element->page=ptr; - element->size=size; - mysql_mutex_lock(&THR_LOCK_malloc); - mem_list=list_add(mem_list,&element->list); - mysql_mutex_unlock(&THR_LOCK_malloc); - } - DBUG_RETURN(ptr); -} - - -void my_free_lock(uchar *ptr) -{ - LIST *list; - struct st_mem_list *element=0; - - mysql_mutex_lock(&THR_LOCK_malloc); - for (list=mem_list ; list ; list=list->next) - { - element=(struct st_mem_list*) list->data; - if (ptr == element->page) - { /* Found locked mem */ - (void) munlock((uchar*) ptr,element->size); - mem_list=list_delete(mem_list,list); - break; - } - } - mysql_mutex_unlock(&THR_LOCK_malloc); - my_free(element); - free(ptr); /* Free even if not locked */ -} - -#endif /* HAVE_MLOCK */ |