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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#if (NGX_HAVE_KQUEUE)
ssize_t
ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
{
ssize_t n;
ngx_err_t err;
ngx_event_t *rev;
rev = c->read;
do {
n = recv(c->fd, buf, size, 0);
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"recv: fd:%d %d of %d", c->fd, n, size);
if (n >= 0) {
if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
rev->available -= n;
/*
* rev->available may be negative here because some additional
* bytes may be received between kevent() and recv()
*/
if (rev->available <= 0) {
rev->ready = 0;
rev->available = 0;
}
}
return n;
}
err = ngx_socket_errno;
if (err == NGX_EAGAIN || err == NGX_EINTR) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
"recv() not ready");
n = NGX_AGAIN;
} else {
n = ngx_connection_error(c, err, "recv() failed");
break;
}
} while (err == NGX_EINTR);
rev->ready = 0;
if (n == NGX_ERROR) {
rev->error = 1;
}
return n;
}
#else /* ! NGX_HAVE_KQUEUE */
ssize_t
ngx_udp_unix_recv(ngx_connection_t *c, u_char *buf, size_t size)
{
ssize_t n;
ngx_err_t err;
ngx_event_t *rev;
rev = c->read;
do {
n = recv(c->fd, buf, size, 0);
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"recv: fd:%d %d of %d", c->fd, n, size);
if (n >= 0) {
return n;
}
err = ngx_socket_errno;
if (err == NGX_EAGAIN || err == NGX_EINTR) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
"recv() not ready");
n = NGX_AGAIN;
} else {
n = ngx_connection_error(c, err, "recv() failed");
break;
}
} while (err == NGX_EINTR);
rev->ready = 0;
if (n == NGX_ERROR) {
rev->error = 1;
}
return n;
}
#endif /* NGX_HAVE_KQUEUE */
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