fumiama/simple-dict
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fix: close exdict race

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源文雨
2022-05-07 23:52:40 +08:00
parent 84da1d596a
commit 2edb491833
2 changed files with 19 additions and 10 deletions
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17
dict.h
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@@ -25,6 +25,7 @@ static uint8_t dict_md5[16];
static volatile int is_ex_dict_open;
static volatile int is_ex_dict_opening;
static volatile uint32_t ex_dict_owner_index = (uint32_t)-1;
static FILE* dict_fp = NULL; // fp for EX
static FILE* dict_thread_fp[THREADCNT];
@@ -89,17 +90,23 @@ static int init_dict(char* file_path) {
return 2;
}
static inline FILE* open_ex_dict() {
static inline FILE* open_ex_dict(uint32_t index) {
is_ex_dict_opening = 1;
if(pthread_rwlock_wrlock(&mu)) {
perror("Open dict: Writelock busy");
perror("Open ex dict: Writelock busy");
is_ex_dict_opening = 0;
return NULL;
}
is_ex_dict_opening = 0;
if(!dict_fp) dict_fp = fopen(dict_filepath, "rb+");
else rewind(dict_fp);
if(dict_fp) is_ex_dict_open = 1;
if(!dict_fp) {
perror("Open ex dict: fopen");
pthread_rwlock_unlock(&mu);
return NULL;
}
is_ex_dict_open = 1;
ex_dict_owner_index = index;
puts("Open ex dict");
return dict_fp;
}
@@ -132,7 +139,8 @@ static inline int require_shared_lock(uint32_t index) {
return 0;
}
static inline void close_ex_dict() {
static inline void close_ex_dict(uint32_t index) {
if(index != ex_dict_owner_index) return;
if(is_ex_dict_open) {
fflush(dict_fp);
for(int i = 0; i < THREADCNT; i++) {
@@ -142,6 +150,7 @@ static inline void close_ex_dict() {
}
}
is_ex_dict_open = 0;
ex_dict_owner_index = (uint32_t)-1;
pthread_rwlock_unlock(&mu);
puts("Close ex dict");
} else puts("Ex dict already closed");

12
server.c
View File

@@ -338,7 +338,7 @@ ERR_INSERT_ITEM:
static int s3_set_data(thread_timer_t *timer) {
if(!setdicts[timer->index].data[0]) return send_data(timer->accept_fd, timer->index, ACKERRO, "erro", 4);
FILE *fp = open_ex_dict();
FILE *fp = open_ex_dict(timer->index);
if(fp == NULL) return send_data(timer->accept_fd, timer->index, ACKERRO, "erro", 4);
int datasize = (timer->numbytes > (DICTDATSZ-1))?(DICTDATSZ-1):timer->numbytes;
@@ -349,7 +349,7 @@ static int s3_set_data(thread_timer_t *timer) {
return send_data(timer->accept_fd, timer->index, ACKERRO, "erro", 4);
int r;
pthread_cleanup_push((void*)&close_ex_dict, NULL);
pthread_cleanup_push((void*)&close_ex_dict, (void*)(uintptr_t)timer->index);
uint8_t* dp = (uint8_t*)setdicts[timer->index].data;
touch_timer(timer);
@@ -463,10 +463,10 @@ static int s4_del(thread_timer_t *timer) {
uint8_t digest[16];
char ret[4];
int r;
FILE *fp = open_ex_dict();
FILE *fp = open_ex_dict(timer->index);
if(fp == NULL) return send_data(timer->accept_fd, timer->index, ACKERRO, "erro", 4);
pthread_cleanup_push((void*)&close_ex_dict, NULL);
pthread_cleanup_push((void*)&close_ex_dict, (void*)(uintptr_t)timer->index);
while(1) {
md5((uint8_t*)timer->dat, strlen(timer->dat)+1, digest);
uint8_t* dp = digest;
@@ -551,7 +551,7 @@ static void cleanup_thread(thread_timer_t* timer) {
timer->accept_fd = 0;
puts("Close accept");
}
close_ex_dict();
close_ex_dict(timer->index);
puts("Finish cleaning");
}
@@ -566,7 +566,7 @@ static void handle_pipe(int signo) {
}
static void handle_accept(void *p) {
puts("Connected to the client, handling accept...");
puts("Handling accept...");
pthread_t thread;
if (pthread_create(&thread, &attr, (void *)&accept_timer, p)) {
perror("Error creating timer thread");