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qfedu-linux-advanced-level
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多任务互斥与同步(互斥锁, 读写锁, 条件变量, 信号量, 命名信号量): 作业

This commit is contained in:
flykhan 2023-08-23 10:17:33 +08:00
parent 8e8af08fcf
commit 8b63cc049a
1 changed files with 6 additions and 4 deletions
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10
day7/homework/h6.c
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@ -7,7 +7,7 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
pthread_mutex_t mutux = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
typedef struct node typedef struct node
{ {
@ -21,7 +21,7 @@ void *find(void *data)
{ {
int n = 0; // 标识待查询内容在链表中的索引号 int n = 0; // 标识待查询内容在链表中的索引号
char *name = (char *)data; char *name = (char *)data;
pthread_mutex_lock(&mutux); pthread_mutex_lock(&mutex);
// 查询 // 查询
Node *p = head->next; Node *p = head->next;
while (p != NULL) while (p != NULL)
@ -29,7 +29,7 @@ void *find(void *data)
if (strcmp(p->name, name) == 0) if (strcmp(p->name, name) == 0)
{ {
printf("%s 在链表的索引为 %d\n", name, n); printf("%s 在链表的索引为 %d\n", name, n);
pthread_mutex_unlock(&mutux); pthread_mutex_unlock(&mutex);
return NULL; return NULL;
} }
@ -38,7 +38,7 @@ void *find(void *data)
p = p->next; p = p->next;
} }
printf("%s 在链表中未找到\n", name); printf("%s 在链表中未找到\n", name);
pthread_mutex_unlock(&mutux); pthread_mutex_unlock(&mutex);
return NULL; return NULL;
} }
@ -89,5 +89,7 @@ int main(int argc, char const *argv[])
pthread_join(t[i], NULL); pthread_join(t[i], NULL);
} }
pthread_mutex_destroy(&mutex);
return 0; return 0;
} }