[4296] | 1 | #include "globals.h"
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[7570] | 2 | #include "oscam-garbage.h"
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[7583] | 3 | #include "oscam-lock.h"
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[7585] | 4 | #include "oscam-string.h"
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[7644] | 5 | #include "oscam-time.h"
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[7570] | 6 |
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[4967] | 7 | #define HASH_BUCKETS 16
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[4296] | 8 |
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| 9 | struct cs_garbage {
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| 10 | time_t time;
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| 11 | void * data;
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[4965] | 12 | #ifdef WITH_DEBUG
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| 13 | char *file;
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[5333] | 14 | uint16_t line;
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[4965] | 15 | #endif
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[4442] | 16 | struct cs_garbage *next;
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[4296] | 17 | };
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| 18 |
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[4967] | 19 | struct cs_garbage *garbage_first[HASH_BUCKETS];
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[8064] | 20 | struct cs_garbage *garbage_last[HASH_BUCKETS];
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[5618] | 21 | CS_MUTEX_LOCK garbage_lock[HASH_BUCKETS];
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[4502] | 22 | pthread_t garbage_thread;
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[4994] | 23 | int32_t garbage_collector_active = 0;
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| 24 | int32_t garbage_debug = 0;
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[4442] | 25 |
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[4965] | 26 | #ifdef WITH_DEBUG
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[5333] | 27 | void add_garbage_debug(void *data, char *file, uint16_t line) {
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[4965] | 28 | #else
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[4296] | 29 | void add_garbage(void *data) {
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[4965] | 30 | #endif
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[6280] | 31 | if (!data)
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| 32 | return;
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[7158] | 33 |
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[6280] | 34 | if (!garbage_collector_active || garbage_debug == 1) {
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[8014] | 35 | cs_sleepms(1);
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[6280] | 36 | free(data);
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| 37 | return;
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| 38 | }
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[7158] | 39 |
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[6280] | 40 | int32_t bucket = (uintptr_t)data/16 % HASH_BUCKETS;
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[8014] | 41 | struct cs_garbage *garbage;
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| 42 | if (!cs_malloc(&garbage, sizeof(struct cs_garbage))){
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| 43 | cs_sleepms(1);
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| 44 | free(data);
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| 45 | return;
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| 46 | }
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| 47 | garbage->time = time(NULL);
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| 48 | garbage->data = data;
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| 49 | #ifdef WITH_DEBUG
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| 50 | garbage->file = file;
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| 51 | garbage->line = line;
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| 52 | #endif
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[6280] | 53 | cs_writelock(&garbage_lock[bucket]);
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[7158] | 54 |
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[6429] | 55 | #ifdef WITH_DEBUG
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[6280] | 56 | if(garbage_debug == 2){
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| 57 | struct cs_garbage *garbagecheck = garbage_first[bucket];
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| 58 | while(garbagecheck) {
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| 59 | if(garbagecheck->data == data) {
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| 60 | cs_log("Found a try to add garbage twice. Not adding the element to garbage list...");
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| 61 | cs_log("Current garbage addition: %s, line %d.", file, line);
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[7158] | 62 | cs_log("Original garbage addition: %s, line %d.", garbagecheck->file, garbagecheck->line);
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[6280] | 63 | cs_writeunlock(&garbage_lock[bucket]);
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[8014] | 64 | free(garbage);
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[6280] | 65 | return;
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| 66 | }
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| 67 | garbagecheck = garbagecheck->next;
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| 68 | }
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| 69 | }
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[6429] | 70 | #endif
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[7158] | 71 |
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[8064] | 72 | if(garbage_last[bucket]) garbage_last[bucket]->next = garbage;
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| 73 | else garbage_first[bucket] = garbage;
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| 74 | garbage_last[bucket] = garbage;
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[6280] | 75 | cs_writeunlock(&garbage_lock[bucket]);
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[4296] | 76 | }
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| 77 |
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[6900] | 78 | void garbage_collector(void) {
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[5618] | 79 | int8_t i;
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[8064] | 80 | struct cs_garbage *garbage, *next, *prev, *first;
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[8282] | 81 | set_thread_name(__func__);
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[4502] | 82 | while (garbage_collector_active) {
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[7158] | 83 |
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[4967] | 84 | for(i = 0; i < HASH_BUCKETS; ++i){
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[5618] | 85 | cs_writelock(&garbage_lock[i]);
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[8064] | 86 | first = garbage_first[i];
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[8016] | 87 | time_t deltime = time((time_t)0) - (2*cfg.ctimeout/1000 + 1); //clienttimeout +1 second
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[8064] | 88 | for(garbage = first, prev = NULL; garbage; prev = garbage, garbage = garbage->next) {
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| 89 | if (deltime < garbage->time) { // all following elements are too new
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| 90 | if(prev){
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| 91 | garbage_first[i] = garbage;
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| 92 | prev->next = NULL;
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| 93 | }
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| 94 | break;
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[8015] | 95 | }
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[4967] | 96 | }
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[8064] | 97 | if(!garbage && garbage_first[i]){ // end of list reached and everything is to be cleaned
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| 98 | garbage = first;
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| 99 | garbage_first[i] = NULL;
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| 100 | garbage_last[i] = NULL;
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| 101 | } else if(prev) garbage = first; // set back to beginning to cleanup all
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| 102 | else garbage = NULL; // garbage not old enough yet => nothing to clean
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[5618] | 103 | cs_writeunlock(&garbage_lock[i]);
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[8064] | 104 |
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| 105 | // list has been taken out before so we don't need a lock here anymore!
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[8015] | 106 | while(garbage){
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| 107 | next = garbage->next;
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| 108 | free(garbage->data);
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| 109 | free(garbage);
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| 110 | garbage = next;
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| 111 | }
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[4967] | 112 | }
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[4502] | 113 | cs_sleepms(1000);
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[4296] | 114 | }
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[4517] | 115 | pthread_exit(NULL);
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[4296] | 116 | }
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| 117 |
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[4994] | 118 | void start_garbage_collector(int32_t debug) {
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[4296] | 119 |
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[5305] | 120 | garbage_debug = debug;
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[5618] | 121 | int8_t i;
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[5305] | 122 | for(i = 0; i < HASH_BUCKETS; ++i){
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[5618] | 123 | cs_lock_create(&garbage_lock[i], 5, "garbage_lock");
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[4442] | 124 |
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[5305] | 125 | garbage_first[i] = NULL;
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| 126 | }
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| 127 | pthread_attr_t attr;
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| 128 | pthread_attr_init(&attr);
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[4502] | 129 |
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[5305] | 130 | garbage_collector_active = 1;
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[4502] | 131 |
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[5305] | 132 | pthread_attr_setstacksize(&attr, PTHREAD_STACK_SIZE);
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[6390] | 133 | int32_t ret = pthread_create(&garbage_thread, &attr, (void*)&garbage_collector, NULL);
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| 134 | if(ret){
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| 135 | cs_log("ERROR: can't create garbagecollector thread (errno=%d %s)", ret, strerror(ret));
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| 136 | pthread_attr_destroy(&attr);
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| 137 | cs_exit(1);
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| 138 | } else
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| 139 | pthread_detach(garbage_thread);
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[5305] | 140 | pthread_attr_destroy(&attr);
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[4296] | 141 | }
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| 142 |
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[6901] | 143 | void stop_garbage_collector(void)
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[4502] | 144 | {
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[5618] | 145 | if (garbage_collector_active) {
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| 146 | int8_t i;
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[7158] | 147 |
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[5618] | 148 | garbage_collector_active = 0;
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| 149 | for(i = 0; i < HASH_BUCKETS; ++i)
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| 150 | cs_writelock(&garbage_lock[i]);
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[7158] | 151 |
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[5618] | 152 | for(i = 0; i < HASH_BUCKETS; ++i){
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| 153 | while (garbage_first[i]) {
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| 154 | struct cs_garbage *next = garbage_first[i]->next;
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| 155 | free(garbage_first[i]->data);
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| 156 | free(garbage_first[i]);
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| 157 | garbage_first[i] = next;
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| 158 | }
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| 159 | }
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| 160 | }
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[4502] | 161 | }
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