diff options
Diffstat (limited to 'pjlib/src/pj/except.c')
| -rw-r--r-- | pjlib/src/pj/except.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/pjlib/src/pj/except.c b/pjlib/src/pj/except.c new file mode 100644 index 00000000..0525caee --- /dev/null +++ b/pjlib/src/pj/except.c @@ -0,0 +1,148 @@ +/* $Header: /pjproject-0.3/pjlib/src/pj/except.c 6 10/14/05 12:26a Bennylp $ */
+/*
+ * $Log: /pjproject-0.3/pjlib/src/pj/except.c $
+ *
+ * 6 10/14/05 12:26a Bennylp
+ * Finished error code framework, some fixes in ioqueue, etc. Pretty
+ * major.
+ *
+ * 5 9/21/05 1:39p Bennylp
+ * Periodic checkin for backup.
+ *
+ * 4 9/17/05 10:37a Bennylp
+ * Major reorganization towards version 0.3.
+ *
+ */
+#include <pj/except.h>
+#include <pj/os.h>
+#include <pj/assert.h>
+#include <pj/log.h>
+#include <pj/errno.h>
+
+static long thread_local_id = -1;
+
+#if defined(PJ_HAS_EXCEPTION_NAMES) && PJ_HAS_EXCEPTION_NAMES != 0
+ static const char *exception_id_names[PJ_MAX_EXCEPTION_ID];
+#else
+ /*
+ * Start from 1 (not 0)!!!
+ * Exception 0 is reserved for normal path of setjmp()!!!
+ */
+ static int last_exception_id = 1;
+#endif /* PJ_HAS_EXCEPTION_NAMES */
+
+
+PJ_DEF(void) pj_throw_exception_(int exception_id)
+{
+ struct pj_exception_state_t *handler;
+
+ handler = pj_thread_local_get(thread_local_id);
+ if (handler == NULL) {
+ PJ_LOG(1,("except.c", "!!!FATAL: unhandled exception %d!\n", exception_id));
+ pj_assert(handler != NULL);
+ /* This will crash the system! */
+ }
+ pj_longjmp(handler->state, exception_id);
+}
+
+PJ_DEF(void) pj_push_exception_handler_(struct pj_exception_state_t *rec)
+{
+ struct pj_exception_state_t *parent_handler = NULL;
+
+ if (thread_local_id == -1) {
+ pj_thread_local_alloc(&thread_local_id);
+ pj_assert(thread_local_id != -1);
+ }
+ parent_handler = pj_thread_local_get(thread_local_id);
+ rec->prev = parent_handler;
+ pj_thread_local_set(thread_local_id, rec);
+}
+
+PJ_DEF(void) pj_pop_exception_handler_(void)
+{
+ struct pj_exception_state_t *handler;
+
+ handler = pj_thread_local_get(thread_local_id);
+ pj_assert(handler != NULL);
+ pj_thread_local_set(thread_local_id, handler->prev);
+}
+
+#if defined(PJ_HAS_EXCEPTION_NAMES) && PJ_HAS_EXCEPTION_NAMES != 0
+PJ_DEF(pj_status_t) pj_exception_id_alloc( const char *name,
+ pj_exception_id_t *id)
+{
+ unsigned i;
+
+ pj_enter_critical_section();
+
+ /*
+ * Start from 1 (not 0)!!!
+ * Exception 0 is reserved for normal path of setjmp()!!!
+ */
+ for (i=1; i<PJ_MAX_EXCEPTION_ID; ++i) {
+ if (exception_id_names[i] == NULL) {
+ exception_id_names[i] = name;
+ *id = i;
+ pj_leave_critical_section();
+ return PJ_SUCCESS;
+ }
+ }
+
+ pj_leave_critical_section();
+ return PJ_ETOOMANY;
+}
+
+PJ_DEF(pj_status_t) pj_exception_id_free( pj_exception_id_t id )
+{
+ /*
+ * Start from 1 (not 0)!!!
+ * Exception 0 is reserved for normal path of setjmp()!!!
+ */
+ PJ_ASSERT_RETURN(id>0 && id<PJ_MAX_EXCEPTION_ID, PJ_EINVAL);
+
+ pj_enter_critical_section();
+ exception_id_names[id] = NULL;
+ pj_leave_critical_section();
+
+ return PJ_SUCCESS;
+
+}
+
+PJ_DEF(const char*) pj_exception_id_name(pj_exception_id_t id)
+{
+ /*
+ * Start from 1 (not 0)!!!
+ * Exception 0 is reserved for normal path of setjmp()!!!
+ */
+ PJ_ASSERT_RETURN(id>0 && id<PJ_MAX_EXCEPTION_ID, "<Invalid ID>");
+
+ if (exception_id_names[id] == NULL)
+ return "<Unallocated ID>";
+
+ return exception_id_names[id];
+}
+
+#else /* PJ_HAS_EXCEPTION_NAMES */
+PJ_DEF(pj_status_t) pj_exception_id_alloc( const char *name,
+ pj_exception_id_t *id)
+{
+ PJ_ASSERT_RETURN(last_exception_id < PJ_MAX_EXCEPTION_ID-1, PJ_ETOOMANY);
+
+ *id = last_exception_id++
+ return PJ_SUCCESS;
+}
+
+PJ_DEF(pj_status_t) pj_exception_id_free( pj_exception_id_t id )
+{
+ return PJ_SUCCESS;
+}
+
+PJ_DEF(const char*) pj_exception_id_name(pj_exception_id_t id)
+{
+ return "";
+}
+
+#endif /* PJ_HAS_EXCEPTION_NAMES */
+
+
+
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