#include <pulsecore/aupdate.h>
#include <pulsecore/atomic.h>
#include <pulsecore/once.h>
+#include <pulsecore/mutex.h>
#include "memtrap.h"
static pa_memtrap *memtraps[2] = { NULL, NULL };
static pa_aupdate *aupdate;
+static pa_static_mutex mutex = PA_STATIC_MUTEX_INIT; /* only required to serialize access to the write side */
static void allocate_aupdate(void) {
PA_ONCE_BEGIN {
pa_memtrap* pa_memtrap_add(const void *start, size_t size) {
pa_memtrap *m = NULL;
unsigned j;
+ pa_mutex *mx;
pa_assert(start);
pa_assert(size > 0);
allocate_aupdate();
+ mx = pa_static_mutex_get(&mutex, FALSE, TRUE);
+ pa_mutex_lock(mx);
+
j = pa_aupdate_write_begin(aupdate);
memtrap_link(m, j);
j = pa_aupdate_write_swap(aupdate);
memtrap_link(m, j);
pa_aupdate_write_end(aupdate);
+ pa_mutex_unlock(mx);
+
return m;
}
void pa_memtrap_remove(pa_memtrap *m) {
unsigned j;
+ pa_mutex *mx;
pa_assert(m);
allocate_aupdate();
+ mx = pa_static_mutex_get(&mutex, FALSE, TRUE);
+ pa_mutex_lock(mx);
+
j = pa_aupdate_write_begin(aupdate);
memtrap_unlink(m, j);
j = pa_aupdate_write_swap(aupdate);
memtrap_unlink(m, j);
pa_aupdate_write_end(aupdate);
+ pa_mutex_unlock(mx);
+
pa_xfree(m);
}
pa_memtrap *pa_memtrap_update(pa_memtrap *m, const void *start, size_t size) {
unsigned j;
+ pa_mutex *mx;
pa_assert(m);
allocate_aupdate();
+ mx = pa_static_mutex_get(&mutex, FALSE, TRUE);
+ pa_mutex_lock(mx);
+
j = pa_aupdate_write_begin(aupdate);
if (m->start == start && m->size == size)
unlock:
pa_aupdate_write_end(aupdate);
+ pa_mutex_unlock(mx);
+
return m;
}