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2009-01-29 Nickolay Semyonov-Kolchin <nbkolchin@gmail.com>

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PR 1359/cpukit
	* libcsupport/src/libio.c: rtems_libio_allocate:
	rtems_libio_iop_freelist incorrectly zeroed on semaphore error. Now
	checks error and does not modify anything until sure it has created
	semaphore.
This commit is contained in:
Joel Sherrill
2009-01-29 17:18:50 +00:00
parent 16bb8afbb1
commit 9ae7cd5237
2 changed files with 16 additions and 6 deletions
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8
cpukit/ChangeLog
View File

@@ -1,3 +1,11 @@
2009-01-29 Nickolay Semyonov-Kolchin <nbkolchin@gmail.com>
PR 1359/cpukit
* libcsupport/src/libio.c: rtems_libio_allocate:
rtems_libio_iop_freelist incorrectly zeroed on semaphore error. Now
checks error and does not modify anything until sure it has created
semaphore.
2009-01-29 Gene Smith <gene.smith@siemens.com>
PR 1363/filesystem

14
cpukit/libcsupport/src/libio.c
View File

@@ -149,23 +149,25 @@ rtems_libio_t *rtems_libio_allocate( void )
{
rtems_libio_t *iop, *next;
rtems_status_code rc;
rtems_id sema;
rtems_semaphore_obtain( rtems_libio_semaphore, RTEMS_WAIT, RTEMS_NO_TIMEOUT );
if (rtems_libio_iop_freelist) {
iop = rtems_libio_iop_freelist;
next = iop->data1;
(void) memset( iop, 0, sizeof(rtems_libio_t) );
iop->flags = LIBIO_FLAGS_OPEN;
rc = rtems_semaphore_create(
RTEMS_LIBIO_IOP_SEM(iop - rtems_libio_iops),
RTEMS_LIBIO_IOP_SEM(rtems_libio_iop_freelist - rtems_libio_iops),
1,
RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
RTEMS_NO_PRIORITY,
&iop->sem
&sema
);
if (rc != RTEMS_SUCCESSFUL)
goto failed;
iop = rtems_libio_iop_freelist;
next = iop->data1;
(void) memset( iop, 0, sizeof(rtems_libio_t) );
iop->flags = LIBIO_FLAGS_OPEN;
iop->sem = sema;
rtems_libio_iop_freelist = next;
goto done;
}