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Fix up portability of memory pool handling a bit.

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1319 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Pierre Ossman 2006-08-22 12:45:43 +00:00
parent fef4a20599
commit cf7b401ac6
1 changed files with 45 additions and 35 deletions
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80
src/pulsecore/shm.c
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@ -54,8 +54,6 @@ static char *segment_name(char *fn, size_t l, unsigned id) {
return fn;
}
#ifdef HAVE_SHM_OPEN
int pa_shm_create_rw(pa_shm *m, size_t size, int shared, mode_t mode) {
char fn[32];
int fd = -1;
@ -90,9 +88,10 @@ int pa_shm_create_rw(pa_shm *m, size_t size, int shared, mode_t mode) {
m->do_unlink = 0;
} else {
#ifdef HAVE_SHM_OPEN
pa_random(&m->id, sizeof(m->id));
segment_name(fn, sizeof(fn), m->id);
if ((fd = shm_open(fn, O_RDWR|O_CREAT|O_EXCL, mode & 0444)) < 0) {
pa_log("shm_open() failed: %s", pa_cstrerror(errno));
goto fail;
@ -110,6 +109,9 @@ int pa_shm_create_rw(pa_shm *m, size_t size, int shared, mode_t mode) {
close(fd);
m->do_unlink = 1;
#else
return -1;
#endif
}
m->shared = shared;
@ -118,40 +120,52 @@ int pa_shm_create_rw(pa_shm *m, size_t size, int shared, mode_t mode) {
fail:
#ifdef HAVE_SHM_OPEN
if (fd >= 0) {
shm_unlink(fn);
close(fd);
}
#endif
return -1;
}
void pa_shm_free(pa_shm *m) {
char fn[32];
assert(m);
assert(m->ptr && m->ptr != MAP_FAILED);
assert(m->ptr);
assert(m->size > 0);
#if !defined(MAP_ANONYMOUS) && defined(HAVE_POSIX_MEMALIGN)
if (!m->shared)
free(m->ptr);
else
#elif !defined(MAP_ANONYMOUS)
if (!m->shared)
pa_xfree(m->ptr);
else
#endif
if (munmap(m->ptr, m->size) < 0)
pa_log("munmap() failed: %s", pa_cstrerror(errno));
#ifdef MAP_FAILED
assert(m->ptr != MAP_FAILED);
#endif
if (m->do_unlink) {
segment_name(fn, sizeof(fn), m->id);
if (shm_unlink(fn) < 0)
pa_log(__FILE__":shm_unlink(%s) failed: %s", fn, pa_cstrerror(errno));
}
if (!m->shared) {
#ifdef MAP_ANONYMOUS
if (munmap(m->ptr, m->size) < 0)
pa_log("munmap() failed: %s", pa_cstrerror(errno));
#elif defined(HAVE_POSIX_MEMALIGN)
free(m->ptr);
#else
pa_xfree(m->ptr);
#endif
} else {
#ifdef HAVE_SHM_OPEN
if (munmap(m->ptr, m->size) < 0)
pa_log("munmap() failed: %s", pa_cstrerror(errno));
if (m->do_unlink) {
char fn[32];
segment_name(fn, sizeof(fn), m->id);
if (shm_unlink(fn) < 0)
pa_log(__FILE__":shm_unlink(%s) failed: %s", fn, pa_cstrerror(errno));
}
#else
/* We shouldn't be here without shm support */
assert(0);
#endif
}
memset(m, 0, sizeof(*m));
}
@ -160,11 +174,15 @@ void pa_shm_punch(pa_shm *m, size_t offset, size_t size) {
void *ptr;
assert(m);
assert(m->ptr && m->ptr != MAP_FAILED);
assert(m->ptr);
assert(m->size > 0);
assert(offset < m->size);
assert(offset+size < m->size);
#ifdef MAP_FAILED
assert(m->ptr != MAP_FAILED);
#endif
/* You're welcome to implement this as NOOP on systems that don't
* support it */
@ -200,6 +218,8 @@ void pa_shm_punch(pa_shm *m, size_t offset, size_t size) {
#endif
}
#ifdef HAVE_SHM_OPEN
int pa_shm_attach_ro(pa_shm *m, unsigned id) {
char fn[32];
int fd = -1;
@ -247,16 +267,6 @@ fail:
#else /* HAVE_SHM_OPEN */
int pa_shm_create_rw(pa_shm *m, size_t size, int shared, mode_t mode) {
return -1;
}
void pa_shm_free(pa_shm *m) {
}
void pa_shm_punch(pa_shm *m, size_t offset, size_t size) {
}
int pa_shm_attach_ro(pa_shm *m, unsigned id) {
return -1;
}