Benny Prijono | dd859a6 | 2005-11-01 16:42:51 +0000 | [diff] [blame^] | 1 | /* $Header: /pjproject-0.3/pjlib/src/pj/except.c 6 10/14/05 12:26a Bennylp $ */ |
| 2 | /* |
| 3 | * $Log: /pjproject-0.3/pjlib/src/pj/except.c $ |
| 4 | * |
| 5 | * 6 10/14/05 12:26a Bennylp |
| 6 | * Finished error code framework, some fixes in ioqueue, etc. Pretty |
| 7 | * major. |
| 8 | * |
| 9 | * 5 9/21/05 1:39p Bennylp |
| 10 | * Periodic checkin for backup. |
| 11 | * |
| 12 | * 4 9/17/05 10:37a Bennylp |
| 13 | * Major reorganization towards version 0.3. |
| 14 | * |
| 15 | */ |
| 16 | #include <pj/except.h> |
| 17 | #include <pj/os.h> |
| 18 | #include <pj/assert.h> |
| 19 | #include <pj/log.h> |
| 20 | #include <pj/errno.h> |
| 21 | |
| 22 | static long thread_local_id = -1; |
| 23 | |
| 24 | #if defined(PJ_HAS_EXCEPTION_NAMES) && PJ_HAS_EXCEPTION_NAMES != 0 |
| 25 | static const char *exception_id_names[PJ_MAX_EXCEPTION_ID]; |
| 26 | #else |
| 27 | /* |
| 28 | * Start from 1 (not 0)!!! |
| 29 | * Exception 0 is reserved for normal path of setjmp()!!! |
| 30 | */ |
| 31 | static int last_exception_id = 1; |
| 32 | #endif /* PJ_HAS_EXCEPTION_NAMES */ |
| 33 | |
| 34 | |
| 35 | PJ_DEF(void) pj_throw_exception_(int exception_id) |
| 36 | { |
| 37 | struct pj_exception_state_t *handler; |
| 38 | |
| 39 | handler = pj_thread_local_get(thread_local_id); |
| 40 | if (handler == NULL) { |
| 41 | PJ_LOG(1,("except.c", "!!!FATAL: unhandled exception %d!\n", exception_id)); |
| 42 | pj_assert(handler != NULL); |
| 43 | /* This will crash the system! */ |
| 44 | } |
| 45 | pj_longjmp(handler->state, exception_id); |
| 46 | } |
| 47 | |
| 48 | PJ_DEF(void) pj_push_exception_handler_(struct pj_exception_state_t *rec) |
| 49 | { |
| 50 | struct pj_exception_state_t *parent_handler = NULL; |
| 51 | |
| 52 | if (thread_local_id == -1) { |
| 53 | pj_thread_local_alloc(&thread_local_id); |
| 54 | pj_assert(thread_local_id != -1); |
| 55 | } |
| 56 | parent_handler = pj_thread_local_get(thread_local_id); |
| 57 | rec->prev = parent_handler; |
| 58 | pj_thread_local_set(thread_local_id, rec); |
| 59 | } |
| 60 | |
| 61 | PJ_DEF(void) pj_pop_exception_handler_(void) |
| 62 | { |
| 63 | struct pj_exception_state_t *handler; |
| 64 | |
| 65 | handler = pj_thread_local_get(thread_local_id); |
| 66 | pj_assert(handler != NULL); |
| 67 | pj_thread_local_set(thread_local_id, handler->prev); |
| 68 | } |
| 69 | |
| 70 | #if defined(PJ_HAS_EXCEPTION_NAMES) && PJ_HAS_EXCEPTION_NAMES != 0 |
| 71 | PJ_DEF(pj_status_t) pj_exception_id_alloc( const char *name, |
| 72 | pj_exception_id_t *id) |
| 73 | { |
| 74 | unsigned i; |
| 75 | |
| 76 | pj_enter_critical_section(); |
| 77 | |
| 78 | /* |
| 79 | * Start from 1 (not 0)!!! |
| 80 | * Exception 0 is reserved for normal path of setjmp()!!! |
| 81 | */ |
| 82 | for (i=1; i<PJ_MAX_EXCEPTION_ID; ++i) { |
| 83 | if (exception_id_names[i] == NULL) { |
| 84 | exception_id_names[i] = name; |
| 85 | *id = i; |
| 86 | pj_leave_critical_section(); |
| 87 | return PJ_SUCCESS; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | pj_leave_critical_section(); |
| 92 | return PJ_ETOOMANY; |
| 93 | } |
| 94 | |
| 95 | PJ_DEF(pj_status_t) pj_exception_id_free( pj_exception_id_t id ) |
| 96 | { |
| 97 | /* |
| 98 | * Start from 1 (not 0)!!! |
| 99 | * Exception 0 is reserved for normal path of setjmp()!!! |
| 100 | */ |
| 101 | PJ_ASSERT_RETURN(id>0 && id<PJ_MAX_EXCEPTION_ID, PJ_EINVAL); |
| 102 | |
| 103 | pj_enter_critical_section(); |
| 104 | exception_id_names[id] = NULL; |
| 105 | pj_leave_critical_section(); |
| 106 | |
| 107 | return PJ_SUCCESS; |
| 108 | |
| 109 | } |
| 110 | |
| 111 | PJ_DEF(const char*) pj_exception_id_name(pj_exception_id_t id) |
| 112 | { |
| 113 | /* |
| 114 | * Start from 1 (not 0)!!! |
| 115 | * Exception 0 is reserved for normal path of setjmp()!!! |
| 116 | */ |
| 117 | PJ_ASSERT_RETURN(id>0 && id<PJ_MAX_EXCEPTION_ID, "<Invalid ID>"); |
| 118 | |
| 119 | if (exception_id_names[id] == NULL) |
| 120 | return "<Unallocated ID>"; |
| 121 | |
| 122 | return exception_id_names[id]; |
| 123 | } |
| 124 | |
| 125 | #else /* PJ_HAS_EXCEPTION_NAMES */ |
| 126 | PJ_DEF(pj_status_t) pj_exception_id_alloc( const char *name, |
| 127 | pj_exception_id_t *id) |
| 128 | { |
| 129 | PJ_ASSERT_RETURN(last_exception_id < PJ_MAX_EXCEPTION_ID-1, PJ_ETOOMANY); |
| 130 | |
| 131 | *id = last_exception_id++ |
| 132 | return PJ_SUCCESS; |
| 133 | } |
| 134 | |
| 135 | PJ_DEF(pj_status_t) pj_exception_id_free( pj_exception_id_t id ) |
| 136 | { |
| 137 | return PJ_SUCCESS; |
| 138 | } |
| 139 | |
| 140 | PJ_DEF(const char*) pj_exception_id_name(pj_exception_id_t id) |
| 141 | { |
| 142 | return ""; |
| 143 | } |
| 144 | |
| 145 | #endif /* PJ_HAS_EXCEPTION_NAMES */ |
| 146 | |
| 147 | |
| 148 | |