我有以下结构
typedef struct {
int buf[BUF_SIZE]; // the buffer
size_t len; // number of items in the buffer
pthread_mutex_t mutex; // needed to add/remove data from the buffer
pthread_cond_t can_produce; // signaled when items are removed
pthread_cond_t can_consume; // signaled when items are added
};
最初我只是按如下方式对其进行初始化
buffer_t buffer = {
.len = 0,
.mutex = PTHREAD_MUTEX_INITIALIZER,
.can_produce = PTHREAD_COND_INITIALIZER,
.can_consume = PTHREAD_COND_INITIALIZER
};
尽管我想使用这些值初始化buffer_t数组，但是我不确定如何正确地执行该操作。
就像是
buffer_t buffer[NUM_ARRAY] = {
.len = 0,
.mutex = PTHREAD_MUTEX_INITIALIZER,
.can_produce = PTHREAD_COND_INITIALIZER,
.can_consume = PTHREAD_COND_INITIALIZER
};
（我意识到这是不正确的）
编辑：我最终使用
buffer_t buffers[NUM_THREADS];
for (i = 0, i < 3, i ++) {
buffers[i] = (buffer_t) {
.len = 0,
.mutex = PTHREAD_MUTEX_INITIALIZER,
.can_produce = PTHREAD_COND_INITIALIZER,
.can_consume = PTHREAD_COND_INITIALIZER
};
}
如果NUM_ARRAY不是太大，您可以执行以下操作：
#define NUM_ARRAY 3
buffer_t buffer[NUM_ARRAY] = {
{ {0}, 0, PTHREAD_MUTEX_INITIALIZER, PTHREAD_COND_INITIALIZER, PTHREAD_COND_INITIALIZER},
{ {0}, 0, PTHREAD_MUTEX_INITIALIZER, PTHREAD_COND_INITIALIZER, PTHREAD_COND_INITIALIZER},
{ {0}, 0, PTHREAD_MUTEX_INITIALIZER, PTHREAD_COND_INITIALIZER, PTHREAD_COND_INITIALIZER}
};
或者，您可以像下面这样显式地编写代码：
buffer_t buffer[NUM_ARRAY];
int i;
for (i=0; i<NUM_ARRAY; i++) {
memset(buffer[i].buf, 0, sizeof(buffer[i].buf));
buffer[i].len = 0;
buffer[i].mutex = PTHREAD_MUTEX_INITIALIZER;
buffer[i].can_produce = PTHREAD_COND_INITIALIZER;
buffer[i].can_consume = PTHREAD_COND_INITIALIZER;
}
编辑：
因此，看起来PTHREAD_MUTEX_INITIALIZERand和PTHREAD_COND_INITIALIZER宏不能在这样的赋值中使用，因为它只能在初始化以及包含{和}字符中使用。
因此，您需要像其他人建议的那样使用初始化语法：
buffer_t buffer[NUM_ARRAY];
int i;
for (i=0; i<NUM_ARRAY; i++) {
buffer[i] = (buffer_t) {
0, 0, PTHREAD_MUTEX_INITIALIZER, PTHREAD_COND_INITIALIZER, PTHREAD_COND_INITIALIZER
};
}
本文收集自互联网，转载请注明来源。
如有侵权，请联系 [email protected] 删除。
我来说两句