Contributed by Fred Fish at Cygnus Support. fnf@cygnus.com
-This file is part of the GNU C Library.
+ This file is part of the GNU C Library.
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
-The GNU C Library 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
-Library General Public License for more details.
+ The GNU C Library 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
+ Library General Public License for more details.
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If
+ not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#include <sys/types.h>
#include <fcntl.h> /* After sys/types.h, at least for dpx/2. */
else if (sbuf.st_size > 0) {
/* We were given an valid file descriptor on an open file, so try to remap
- it into the current process at the same address to which it was previously
- mapped. It naturally have to pass some sanity checks for that.
+ it into the current process at the same address to which it was previously
+ mapped. It naturally have to pass some sanity checks for that.
- Note that we have to update the file descriptor number in the malloc-
- descriptor read from the file to match the current valid one, before
- trying to map the file in, and again after a successful mapping and
- after we've switched over to using the mapped in malloc descriptor
- rather than the temporary one on the stack.
+ Note that we have to update the file descriptor number in the malloc-
+ descriptor read from the file to match the current valid one, before
+ trying to map the file in, and again after a successful mapping and
+ after we've switched over to using the mapped in malloc descriptor
+ rather than the temporary one on the stack.
- Once we've switched over to using the mapped in malloc descriptor, we
- have to update the pointer to the morecore function, since it almost
- certainly will be at a different address if the process reusing the
- mapped region is from a different executable.
+ Once we've switched over to using the mapped in malloc descriptor, we
+ have to update the pointer to the morecore function, since it almost
+ certainly will be at a different address if the process reusing the
+ mapped region is from a different executable.
- Also note that if the heap being remapped previously used the mmcheckf()
- routines, we need to update the hooks since their target functions
- will have certainly moved if the executable has changed in any way.
- We do this by calling mmcheckf() internally.
+ Also note that if the heap being remapped previously used the mmcheckf()
+ routines, we need to update the hooks since their target functions
+ will have certainly moved if the executable has changed in any way.
+ We do this by calling mmcheckf() internally.
- Returns a pointer to the malloc descriptor if successful, or NULL if
- unsuccessful for some reason. */
+ Returns a pointer to the malloc descriptor if successful, or NULL if
+ unsuccessful for some reason. */
struct mdesc newmd;
struct mdesc *mdptr = NULL, *mdptemp = NULL;
if (lseek(fd, 0L, SEEK_SET) != 0)
- return NULL;
+ return NULL;
if (read(fd, (char *) &newmd, sizeof(newmd)) != sizeof(newmd))
- return NULL;
+ return NULL;
if (newmd.headersize != sizeof(newmd))
- return NULL;
+ return NULL;
if (strcmp(newmd.magic, MMALLOC_MAGIC) != 0)
- return NULL;
+ return NULL;
if (newmd.version > MMALLOC_VERSION)
- return NULL;
+ return NULL;
newmd.fd = fd;
if (__mmalloc_remap_core(&newmd) == newmd.base) {
- mdptr = (struct mdesc *) newmd.base;
- mdptr->fd = fd;
- if(!mdptr->refcount){
- sem_init(&mdptr->sem, 0, 1);
- mdptr->refcount++;
- }
+ mdptr = (struct mdesc *) newmd.base;
+ mdptr->fd = fd;
+ if(!mdptr->refcount){
+ sem_init(&mdptr->sem, 0, 1);
+ mdptr->refcount++;
+ }
}
/* Add the new heap to the linked list of heaps attached by mmalloc */
mdptemp = __mmalloc_default_mdp;
while(mdptemp->next_mdesc)
- mdptemp = mdptemp->next_mdesc;
+ mdptemp = mdptemp->next_mdesc;
LOCK(mdptemp);
mdptemp->next_mdesc = mdptr;
mdp = mdp->next_mdesc;
LOCK(mdp);
- mdp->next_mdesc = (struct mdesc *)mbase;
+ mdp->next_mdesc = (struct mdesc *)mbase;
UNLOCK(mdp);
}
}
/** Terminate access to a mmalloc managed region by unmapping all memory pages
- associated with the region, and closing the file descriptor if it is one
- that we opened.
+ associated with the region, and closing the file descriptor if it is one
+ that we opened.
- Returns NULL on success.
+ Returns NULL on success.
- Returns the malloc descriptor on failure, which can subsequently be used
- for further action, such as obtaining more information about the nature of
- the failure.
+ Returns the malloc descriptor on failure, which can subsequently be used
+ for further action, such as obtaining more information about the nature of
+ the failure.
- Note that the malloc descriptor that we are using is currently located in
- region we are about to unmap, so we first make a local copy of it on the
- stack and use the copy. */
+ Note that the malloc descriptor that we are using is currently located in
+ region we are about to unmap, so we first make a local copy of it on the
+ stack and use the copy. */
void *xbt_mheap_destroy(xbt_mheap_t mdp)
{
__mmalloc_default_mdp = xbt_mheap_new(-1, addr);
/* Fixme? only the default mdp in protected against forks */
res = xbt_os_thread_atfork(mmalloc_fork_prepare,
- mmalloc_fork_parent, mmalloc_fork_child);
+ mmalloc_fork_parent, mmalloc_fork_child);
if (res != 0)
THROWF(system_error,0,"xbt_os_thread_atfork() failed: return value %d",res);
}
