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发表于 2021-12-29 20:23:37
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main.c
- #include "common.h"
- #include <stdlib.h>
- parameter_t *parameter_init(void) {
- parameter_t *parameter = malloc(sizeof(*parameter));
- parameter->exit = false;
- parameter->list = list_init();
- pthread_mutex_init(¶meter->mutex, NULL);
- return parameter;
- }
- void parameter_deinit(parameter_t *parameter) {
- pthread_mutex_destroy(¶meter->mutex);
- list_deinit(parameter->list);
- free(parameter);
- }
- int main(void) {
- parameter_t *parameter = parameter_init();
- pthread_t thread[2];
- pthread_create(&thread[0], NULL, thread_A, parameter);
- pthread_create(&thread[1], NULL, thread_B, parameter);
- void *rv;
- pthread_join(thread[0], &rv);
- pthread_join(thread[1], &rv);
- parameter_deinit(parameter);
- return 0;
- }
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common.h
- #ifndef _COMMON_H_
- #define _COMMON_H_
- #include "list.h"
- #include <stdbool.h>
- #include <pthread.h>
- #include <time.h>
- typedef struct {
- volatile bool exit;
- list_t *list;
- pthread_mutex_t mutex;
- } parameter_t;
- typedef struct {
- size_t data;
- time_t time;
- } element_t;
- void *thread_A();
- void *thread_B();
- void list_output(const list_t *list);
- #endif
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common.c
- #include "common.h"
- #include <stdio.h>
- void list_output(const list_t *list) {
- for(size_t i = 0; i < list_size(list); ++i) {
- element_t e;
- list_get(list, i, &e, sizeof(e));
- printf("%lu ", e.data);
- }
- puts("");
- }
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list.h
- #ifndef _LIST_H_
- #define _LIST_H_
- #include <stddef.h>
- #include <stdbool.h>
- struct list_node_tag {
- void *data; size_t size;
- struct list_node_tag *next;
- };
- typedef struct {
- struct list_node_tag *head;
- size_t size;
- } list_t;
- list_t *list_init(void);
- void list_deinit(list_t *list);
- bool list_clean(list_t *list);
- bool list_insert(list_t *list, size_t index, const void *data, size_t size);
- bool list_delete(list_t *list, size_t index);
- bool list_get(const list_t *list, size_t index, void *data, size_t size);
- bool list_set(list_t *list, size_t index, const void *data, size_t size);
- bool list_append(list_t *list, const void *data, size_t size);
- size_t list_size(const list_t *list);
- bool list_empty(const list_t *list);
- #endif
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list.c
- #include "list.h"
- #include <stdlib.h>
- #include <memory.h>
- list_t *list_init(void) {
- list_t *list = malloc(sizeof(*list));
- if(!list) return NULL;
- list->head = NULL;
- list->size = 0;
- return list;
- }
- void list_deinit(list_t *list) {
- if(!list) return;
- list_clean(list);
- free(list);
- }
- bool list_clean(list_t *list) {
- if(!list) return false;
- while(!list_empty(list)) list_delete(list, 0);
- return true;
- }
- bool list_insert(list_t *list, size_t index, const void *data, size_t size) {
- if(!list) return false;
- if(list_size(list) < index) return false;
- if(!data) return false;
- struct list_node_tag **current = &list->head;
- while(index--) current = &(*current)->next;
- struct list_node_tag *node = malloc(sizeof(*node));
- if(!node) return false;
- node->data = malloc(size);
- if(!node->data) {free(node); return false;}
- memcpy(node->data, data, size);
- node->size = size;
- node->next = *current;
- *current = node;
- ++list->size;
- return true;
- }
- bool list_delete(list_t *list, size_t index) {
- if(!list) return false;
- if(list_size(list) <= index) return false;
- struct list_node_tag **current = &list->head;
- while(index--) current = &(*current)->next;
- struct list_node_tag *temp = *current;
- *current = temp->next;
- free(temp->data); free(temp);
- --list->size;
- return true;
- }
- bool list_get(const list_t *list, size_t index, void *data, size_t size) {
- if(!list) return false;
- if(list_size(list) <= index) return false;
- if(!data) return false;
- struct list_node_tag *const *current = &list->head;
- while(index--) current = &(*current)->next;
- struct list_node_tag *temp = *current;
- if(temp->size > size) return false;
- memcpy(data, temp->data, temp->size);
- return true;
- }
- bool list_set(list_t *list, size_t index, const void *data, size_t size) {
- bool res = list_delete(list, index);
- return res ? list_insert(list, index, data, size) : res;
- }
- bool list_append(list_t *list, const void *data, size_t size) {
- if(!list) return false;
- return list_insert(list, list_size(list), data, size);
- }
- size_t list_size(const list_t *list) {
- if(!list) return 0;
- return list->size;
- }
- bool list_empty(const list_t *list) {
- if(!list) return true;
- return list_size(list) == 0;
- }
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thread_A.c
- #include "common.h"
- #include <stdio.h>
- void *thread_A(parameter_t *parameter) {
- while(1) {
- element_t e;
- if(scanf("%lu%lu", &e.data, &e.time) != 2) break;
- if(!e.time) break;
- pthread_mutex_lock(¶meter->mutex);
- list_append(parameter->list, &e, sizeof(e));
- list_output(parameter->list);
- pthread_mutex_unlock(¶meter->mutex);
- }
- parameter->exit = true;
- return NULL;
- }
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thread_B.c
- #include "common.h"
- #include <unistd.h>
- static void list_data_next(list_t *list) {
- for(size_t i = 0; i < list_size(list); ++i) {
- element_t e;
- list_get(list, i, &e, sizeof(e));
- if(!--e.time) {
- list_delete(list, i);
- list_output(list);
- continue;
- }
- list_set(list, i, &e, sizeof(e));
- }
- }
- void *thread_B(parameter_t *parameter) {
- static size_t count;
- while(1) {
- usleep(100000);
- if(parameter->exit) break;
- if(++count == 10) {
- count = 0;
- pthread_mutex_lock(¶meter->mutex);
- list_data_next(parameter->list);
- pthread_mutex_unlock(¶meter->mutex);
- }
- }
- return NULL;
- }
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- gcc -g -Wall -o main main.c list.c thread_A.c thread_B.c common.c -lpthread
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