1 #ifdef JEMALLOC_INTERNAL_TSD_GENERIC_H 2 #error This file should be included only once, by tsd.h. 3 #endif 4 #define JEMALLOC_INTERNAL_TSD_GENERIC_H 5 6 typedef struct tsd_init_block_s tsd_init_block_t; 7 struct tsd_init_block_s { 8 ql_elm(tsd_init_block_t) link; 9 pthread_t thread; 10 void *data; 11 }; 12 13 /* Defined in tsd.c, to allow the mutex headers to have tsd dependencies. */ 14 typedef struct tsd_init_head_s tsd_init_head_t; 15 16 typedef struct { 17 bool initialized; 18 tsd_t val; 19 } tsd_wrapper_t; 20 21 void *tsd_init_check_recursion(tsd_init_head_t *head, 22 tsd_init_block_t *block); 23 void tsd_init_finish(tsd_init_head_t *head, tsd_init_block_t *block); 24 25 extern pthread_key_t tsd_tsd; 26 extern tsd_init_head_t tsd_init_head; 27 extern tsd_wrapper_t tsd_boot_wrapper; 28 extern bool tsd_booted; 29 30 /* Initialization/cleanup. */ 31 JEMALLOC_ALWAYS_INLINE void tsd_cleanup_wrapper(void * arg)32tsd_cleanup_wrapper(void *arg) { 33 tsd_wrapper_t *wrapper = (tsd_wrapper_t *)arg; 34 35 if (wrapper->initialized) { 36 wrapper->initialized = false; 37 tsd_cleanup(&wrapper->val); 38 if (wrapper->initialized) { 39 /* Trigger another cleanup round. */ 40 if (pthread_setspecific(tsd_tsd, (void *)wrapper) != 0) 41 { 42 malloc_write("<jemalloc>: Error setting TSD\n"); 43 if (opt_abort) { 44 abort(); 45 } 46 } 47 return; 48 } 49 } 50 malloc_tsd_dalloc(wrapper); 51 } 52 53 JEMALLOC_ALWAYS_INLINE void tsd_wrapper_set(tsd_wrapper_t * wrapper)54tsd_wrapper_set(tsd_wrapper_t *wrapper) { 55 if (pthread_setspecific(tsd_tsd, (void *)wrapper) != 0) { 56 malloc_write("<jemalloc>: Error setting TSD\n"); 57 abort(); 58 } 59 } 60 61 JEMALLOC_ALWAYS_INLINE tsd_wrapper_t * tsd_wrapper_get(bool init)62tsd_wrapper_get(bool init) { 63 tsd_wrapper_t *wrapper = (tsd_wrapper_t *)pthread_getspecific(tsd_tsd); 64 65 if (init && unlikely(wrapper == NULL)) { 66 tsd_init_block_t block; 67 wrapper = (tsd_wrapper_t *) 68 tsd_init_check_recursion(&tsd_init_head, &block); 69 if (wrapper) { 70 return wrapper; 71 } 72 wrapper = (tsd_wrapper_t *) 73 malloc_tsd_malloc(sizeof(tsd_wrapper_t)); 74 block.data = (void *)wrapper; 75 if (wrapper == NULL) { 76 malloc_write("<jemalloc>: Error allocating TSD\n"); 77 abort(); 78 } else { 79 wrapper->initialized = false; 80 tsd_t initializer = TSD_INITIALIZER; 81 wrapper->val = initializer; 82 } 83 tsd_wrapper_set(wrapper); 84 tsd_init_finish(&tsd_init_head, &block); 85 } 86 return wrapper; 87 } 88 89 JEMALLOC_ALWAYS_INLINE bool tsd_boot0(void)90tsd_boot0(void) { 91 if (pthread_key_create(&tsd_tsd, tsd_cleanup_wrapper) != 0) { 92 return true; 93 } 94 tsd_wrapper_set(&tsd_boot_wrapper); 95 tsd_booted = true; 96 return false; 97 } 98 99 JEMALLOC_ALWAYS_INLINE void tsd_boot1(void)100tsd_boot1(void) { 101 tsd_wrapper_t *wrapper; 102 wrapper = (tsd_wrapper_t *)malloc_tsd_malloc(sizeof(tsd_wrapper_t)); 103 if (wrapper == NULL) { 104 malloc_write("<jemalloc>: Error allocating TSD\n"); 105 abort(); 106 } 107 tsd_boot_wrapper.initialized = false; 108 tsd_cleanup(&tsd_boot_wrapper.val); 109 wrapper->initialized = false; 110 tsd_t initializer = TSD_INITIALIZER; 111 wrapper->val = initializer; 112 tsd_wrapper_set(wrapper); 113 } 114 115 JEMALLOC_ALWAYS_INLINE bool tsd_boot(void)116tsd_boot(void) { 117 if (tsd_boot0()) { 118 return true; 119 } 120 tsd_boot1(); 121 return false; 122 } 123 124 JEMALLOC_ALWAYS_INLINE bool tsd_booted_get(void)125tsd_booted_get(void) { 126 return tsd_booted; 127 } 128 129 JEMALLOC_ALWAYS_INLINE bool tsd_get_allocates(void)130tsd_get_allocates(void) { 131 return true; 132 } 133 134 /* Get/set. */ 135 JEMALLOC_ALWAYS_INLINE tsd_t * tsd_get(bool init)136tsd_get(bool init) { 137 tsd_wrapper_t *wrapper; 138 139 assert(tsd_booted); 140 wrapper = tsd_wrapper_get(init); 141 if (tsd_get_allocates() && !init && wrapper == NULL) { 142 return NULL; 143 } 144 return &wrapper->val; 145 } 146 147 JEMALLOC_ALWAYS_INLINE void tsd_set(tsd_t * val)148tsd_set(tsd_t *val) { 149 tsd_wrapper_t *wrapper; 150 151 assert(tsd_booted); 152 wrapper = tsd_wrapper_get(true); 153 if (likely(&wrapper->val != val)) { 154 wrapper->val = *(val); 155 } 156 wrapper->initialized = true; 157 } 158