Annotation of embedaddon/php/Zend/zend_gc.h, revision 1.1
1.1 ! misho 1: /*
! 2: +----------------------------------------------------------------------+
! 3: | Zend Engine |
! 4: +----------------------------------------------------------------------+
! 5: | Copyright (c) 1998-2012 Zend Technologies Ltd. (http://www.zend.com) |
! 6: +----------------------------------------------------------------------+
! 7: | This source file is subject to version 2.00 of the Zend license, |
! 8: | that is bundled with this package in the file LICENSE, and is |
! 9: | available through the world-wide-web at the following url: |
! 10: | http://www.zend.com/license/2_00.txt. |
! 11: | If you did not receive a copy of the Zend license and are unable to |
! 12: | obtain it through the world-wide-web, please send a note to |
! 13: | license@zend.com so we can mail you a copy immediately. |
! 14: +----------------------------------------------------------------------+
! 15: | Authors: David Wang <planetbeing@gmail.com> |
! 16: | Dmitry Stogov <dmitry@zend.com> |
! 17: +----------------------------------------------------------------------+
! 18: */
! 19:
! 20: /* $Id: zend_gc.h 321634 2012-01-01 13:15:04Z felipe $ */
! 21:
! 22: #ifndef ZEND_GC_H
! 23: #define ZEND_GC_H
! 24:
! 25: #ifndef GC_BENCH
! 26: # define GC_BENCH 0
! 27: #endif
! 28:
! 29: #if GC_BENCH
! 30: # define GC_BENCH_INC(counter) GC_G(counter)++
! 31: # define GC_BENCH_DEC(counter) GC_G(counter)--
! 32: # define GC_BENCH_PEAK(peak, counter) do { \
! 33: if (GC_G(counter) > GC_G(peak)) { \
! 34: GC_G(peak) = GC_G(counter); \
! 35: } \
! 36: } while (0)
! 37: #else
! 38: # define GC_BENCH_INC(counter)
! 39: # define GC_BENCH_DEC(counter)
! 40: # define GC_BENCH_PEAK(peak, counter)
! 41: #endif
! 42:
! 43: #define GC_COLOR 0x03
! 44:
! 45: #define GC_BLACK 0x00
! 46: #define GC_WHITE 0x01
! 47: #define GC_GREY 0x02
! 48: #define GC_PURPLE 0x03
! 49:
! 50: #define GC_ADDRESS(v) \
! 51: ((gc_root_buffer*)(((zend_uintptr_t)(v)) & ~GC_COLOR))
! 52: #define GC_SET_ADDRESS(v, a) \
! 53: (v) = ((gc_root_buffer*)((((zend_uintptr_t)(v)) & GC_COLOR) | ((zend_uintptr_t)(a))))
! 54: #define GC_GET_COLOR(v) \
! 55: (((zend_uintptr_t)(v)) & GC_COLOR)
! 56: #define GC_SET_COLOR(v, c) \
! 57: (v) = ((gc_root_buffer*)((((zend_uintptr_t)(v)) & ~GC_COLOR) | (c)))
! 58: #define GC_SET_BLACK(v) \
! 59: (v) = ((gc_root_buffer*)(((zend_uintptr_t)(v)) & ~GC_COLOR))
! 60: #define GC_SET_PURPLE(v) \
! 61: (v) = ((gc_root_buffer*)(((zend_uintptr_t)(v)) | GC_PURPLE))
! 62:
! 63: #define GC_ZVAL_INIT(z) \
! 64: ((zval_gc_info*)(z))->u.buffered = NULL
! 65: #define GC_ZVAL_ADDRESS(v) \
! 66: GC_ADDRESS(((zval_gc_info*)(v))->u.buffered)
! 67: #define GC_ZVAL_SET_ADDRESS(v, a) \
! 68: GC_SET_ADDRESS(((zval_gc_info*)(v))->u.buffered, (a))
! 69: #define GC_ZVAL_GET_COLOR(v) \
! 70: GC_GET_COLOR(((zval_gc_info*)(v))->u.buffered)
! 71: #define GC_ZVAL_SET_COLOR(v, c) \
! 72: GC_SET_COLOR(((zval_gc_info*)(v))->u.buffered, (c))
! 73: #define GC_ZVAL_SET_BLACK(v) \
! 74: GC_SET_BLACK(((zval_gc_info*)(v))->u.buffered)
! 75: #define GC_ZVAL_SET_PURPLE(v) \
! 76: GC_SET_PURPLE(((zval_gc_info*)(v))->u.buffered)
! 77:
! 78: #define GC_OBJ_INIT(z) \
! 79: (z)->buffered = NULL
! 80:
! 81: typedef struct _gc_root_buffer {
! 82: struct _gc_root_buffer *prev; /* double-linked list */
! 83: struct _gc_root_buffer *next;
! 84: zend_object_handle handle; /* must be 0 for zval */
! 85: union {
! 86: zval *pz;
! 87: zend_object_handlers *handlers;
! 88: } u;
! 89: } gc_root_buffer;
! 90:
! 91: typedef struct _zval_gc_info {
! 92: zval z;
! 93: union {
! 94: gc_root_buffer *buffered;
! 95: struct _zval_gc_info *next;
! 96: } u;
! 97: } zval_gc_info;
! 98:
! 99: typedef struct _zend_gc_globals {
! 100: zend_bool gc_enabled;
! 101: zend_bool gc_active;
! 102:
! 103: gc_root_buffer *buf; /* preallocated arrays of buffers */
! 104: gc_root_buffer roots; /* list of possible roots of cycles */
! 105: gc_root_buffer *unused; /* list of unused buffers */
! 106: gc_root_buffer *first_unused; /* pointer to first unused buffer */
! 107: gc_root_buffer *last_unused; /* pointer to last unused buffer */
! 108:
! 109: zval_gc_info *zval_to_free; /* temporaryt list of zvals to free */
! 110: zval_gc_info *free_list;
! 111: zval_gc_info *next_to_free;
! 112:
! 113: zend_uint gc_runs;
! 114: zend_uint collected;
! 115:
! 116: #if GC_BENCH
! 117: zend_uint root_buf_length;
! 118: zend_uint root_buf_peak;
! 119: zend_uint zval_possible_root;
! 120: zend_uint zobj_possible_root;
! 121: zend_uint zval_buffered;
! 122: zend_uint zobj_buffered;
! 123: zend_uint zval_remove_from_buffer;
! 124: zend_uint zobj_remove_from_buffer;
! 125: zend_uint zval_marked_grey;
! 126: zend_uint zobj_marked_grey;
! 127: #endif
! 128:
! 129: } zend_gc_globals;
! 130:
! 131: #ifdef ZTS
! 132: BEGIN_EXTERN_C()
! 133: ZEND_API extern int gc_globals_id;
! 134: END_EXTERN_C()
! 135: #define GC_G(v) TSRMG(gc_globals_id, zend_gc_globals *, v)
! 136: #else
! 137: #define GC_G(v) (gc_globals.v)
! 138: extern ZEND_API zend_gc_globals gc_globals;
! 139: #endif
! 140:
! 141: BEGIN_EXTERN_C()
! 142: ZEND_API int gc_collect_cycles(TSRMLS_D);
! 143: ZEND_API void gc_zval_possible_root(zval *zv TSRMLS_DC);
! 144: ZEND_API void gc_zobj_possible_root(zval *zv TSRMLS_DC);
! 145: ZEND_API void gc_remove_zval_from_buffer(zval *zv TSRMLS_DC);
! 146: ZEND_API void gc_globals_ctor(TSRMLS_D);
! 147: ZEND_API void gc_globals_dtor(TSRMLS_D);
! 148: ZEND_API void gc_init(TSRMLS_D);
! 149: ZEND_API void gc_reset(TSRMLS_D);
! 150: END_EXTERN_C()
! 151:
! 152: #define GC_ZVAL_CHECK_POSSIBLE_ROOT(z) \
! 153: gc_zval_check_possible_root((z) TSRMLS_CC)
! 154:
! 155: #define GC_REMOVE_FROM_BUFFER(current) \
! 156: gc_remove_from_buffer((current) TSRMLS_CC)
! 157:
! 158: #define GC_REMOVE_ZVAL_FROM_BUFFER(z) \
! 159: if (GC_ADDRESS(((zval_gc_info*)z)->u.buffered)) { \
! 160: gc_remove_zval_from_buffer(z TSRMLS_CC); \
! 161: }
! 162:
! 163: #define GC_ZOBJ_CHECK_POSSIBLE_ROOT(zobject) \
! 164: do { \
! 165: if (EXPECTED(EG(objects_store).object_buckets != NULL) && \
! 166: EG(objects_store).object_buckets[Z_OBJ_HANDLE_P(zobject)].valid) { \
! 167: gc_zobj_possible_root(zobject TSRMLS_CC); \
! 168: } \
! 169: } while (0)
! 170:
! 171: #define GC_REMOVE_ZOBJ_FROM_BUFFER(obj) \
! 172: do { \
! 173: if (GC_ADDRESS((obj)->buffered) && !GC_G(gc_active)) { \
! 174: GC_BENCH_INC(zobj_remove_from_buffer); \
! 175: GC_REMOVE_FROM_BUFFER(GC_ADDRESS((obj)->buffered)); \
! 176: (obj)->buffered = NULL; \
! 177: } \
! 178: } while (0)
! 179:
! 180: static zend_always_inline void gc_zval_check_possible_root(zval *z TSRMLS_DC)
! 181: {
! 182: if (z->type == IS_ARRAY || z->type == IS_OBJECT) {
! 183: gc_zval_possible_root(z TSRMLS_CC);
! 184: }
! 185: }
! 186:
! 187: static zend_always_inline void gc_remove_from_buffer(gc_root_buffer *root TSRMLS_DC)
! 188: {
! 189: root->next->prev = root->prev;
! 190: root->prev->next = root->next;
! 191: root->prev = GC_G(unused);
! 192: GC_G(unused) = root;
! 193: GC_BENCH_DEC(root_buf_length);
! 194: }
! 195:
! 196: #define ALLOC_PERMANENT_ZVAL(z) \
! 197: do { \
! 198: (z) = (zval*)malloc(sizeof(zval_gc_info)); \
! 199: GC_ZVAL_INIT(z); \
! 200: } while (0)
! 201:
! 202: /* The following macroses override macroses from zend_alloc.h */
! 203: #undef ALLOC_ZVAL
! 204: #define ALLOC_ZVAL(z) \
! 205: do { \
! 206: (z) = (zval*)emalloc(sizeof(zval_gc_info)); \
! 207: GC_ZVAL_INIT(z); \
! 208: } while (0)
! 209:
! 210: #undef FREE_ZVAL
! 211: #define FREE_ZVAL(z) \
! 212: do { \
! 213: GC_REMOVE_ZVAL_FROM_BUFFER(z); \
! 214: efree(z); \
! 215: } while (0)
! 216:
! 217: #undef ALLOC_ZVAL_REL
! 218: #define ALLOC_ZVAL_REL(z) \
! 219: do { \
! 220: (z) = (zval*)emalloc_rel(sizeof(zval_gc_info)); \
! 221: GC_ZVAL_INIT(z); \
! 222: } while (0)
! 223:
! 224: #undef FREE_ZVAL_REL
! 225: #define FREE_ZVAL_REL(z) \
! 226: do { \
! 227: GC_REMOVE_ZVAL_FROM_BUFFER(z); \
! 228: efree_rel(z); \
! 229: } while (0)
! 230:
! 231: #define FREE_ZVAL_EX(z) \
! 232: efree(z)
! 233:
! 234: #define FREE_ZVAL_REL_EX(z) \
! 235: efree_rel(z)
! 236:
! 237: #endif /* ZEND_GC_H */
! 238:
! 239: /*
! 240: * Local variables:
! 241: * tab-width: 4
! 242: * c-basic-offset: 4
! 243: * indent-tabs-mode: t
! 244: * End:
! 245: */
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