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#include <unistd.h>
#include "error.h"
#include "iopause.h"
#include "timeout.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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