The submitted at github:
https://github.com/libuv/libuv/issues/754
The code is modified, but the issue still exist.
New code: add QUEUE_INIT(&w1.wq); .... QUEUE_INIT(&w4.wq);
#include "queue.h"
#include <stdio.h>
struct uv__work {
int id;
void* wq[2];
};
#define QUEUE_DATA(ptr, type, field) \
((type *) ((char *) (ptr) - offsetof(type, field)))
static QUEUE wq;
int main()
{
struct uv__work *pw;
QUEUE* q;
QUEUE_INIT(&wq);
struct uv__work w1;
w1.id = 1;
QUEUE_INIT(&w1.wq);
QUEUE_INSERT_TAIL(&wq, &w1.wq);
struct uv__work w2;
w2.id = 2;
QUEUE_INIT(&w2.wq);
QUEUE_INSERT_TAIL(&wq, &w2.wq);
struct uv__work w3;
w3.id = 3;
QUEUE_INIT(&w3.wq);
QUEUE_INSERT_TAIL(&wq, &w3.wq);
QUEUE_FOREACH(q, &wq)
{
pw = QUEUE_DATA(q, uv__work, wq);
printf("queue wq data is %d.\n", pw->id);
}
printf("-----------------------------\n");
QUEUE wq2;
QUEUE_INIT(&wq2);
struct uv__work w4;
w4.id = 4;
QUEUE_INIT(&w4.wq);
QUEUE_INSERT_TAIL(&wq2, &w4.wq);
QUEUE_FOREACH(q, &wq2)
{
pw = QUEUE_DATA(q, uv__work, wq);
printf("queue wq2 data is %d.\n", pw->id);
}
printf("-----------------------------\n");
QUEUE_ADD(&wq, &wq2); // add
QUEUE_FOREACH(q, &wq)
{
pw = QUEUE_DATA(q, uv__work, wq);
printf("queue wq data is %d.\n", pw->id);
}
printf("-----------------------------\n");
QUEUE_FOREACH(q, &wq2)
{
pw = QUEUE_DATA(q, uv__work, wq);
printf("queue wq2 data is %d.\n", pw->id);
}
printf("-----------------------------\n");
return 0;
}
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