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#include "timeout.h"
#include <unistd.h>
#include "error.h"
#include "iopause.h"
/**
@file timeout.c
@author djb
@ref qmail
@brief read/write timeout handling
@return same as read(2) or write(2); -1 on error
*/
int timeoutread(int t, int fd, char *buf, int len)
{
struct taia now;
struct taia deadline;
iopause_fd x;
taia_now(&now);
taia_uint(&deadline, t);
taia_add(&deadline, &now, &deadline);
x.fd = fd;
x.events = IOPAUSE_READ;
for (;;) {
taia_now(&now);
iopause(&x, 1, &deadline, &now);
if (x.revents) break;
if (taia_less(&deadline, &now)) {
errno = ETIMEDOUT;
return -1;
}
}
return read(fd, buf, len);
}
int timeoutwrite(int t, int fd, char *buf, int len)
{
struct taia now;
struct taia deadline;
iopause_fd x;
taia_now(&now);
taia_uint(&deadline, t);
taia_add(&deadline, &now, &deadline);
x.fd = fd;
x.events = IOPAUSE_WRITE;
for (;;) {
taia_now(&now);
iopause(&x, 1, &deadline, &now);
if (x.revents) break;
if (taia_less(&deadline, &now)) {
errno = ETIMEDOUT;
return -1;
}
}
return write(fd, buf, len);
}
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