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Merged implementations of ngx_readv_chain().

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There's no real need in two separate implementations,
with and without kqueue support.
This commit is contained in:
Valentin Bartenev 2014-08-13 15:11:45 +04:00
parent 77d61350a4
commit 0a02bdb249
1 changed files with 9 additions and 97 deletions
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170
src/os/unix/ngx_readv_chain.c
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@ -17,8 +17,6 @@
#endif
#if (NGX_HAVE_KQUEUE)
ssize_t
ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain)
{
@ -31,6 +29,8 @@ ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain)
rev = c->read;
#if (NGX_HAVE_KQUEUE)
if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"readv: eof:%d, avail:%d, err:%d",
@ -58,6 +58,8 @@ ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain)
}
}
#endif
prev = NULL;
iov = NULL;
size = 0;
@ -102,6 +104,9 @@ ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain)
n = readv(c->fd, (struct iovec *) vec.elts, vec.nelts);
if (n >= 0) {
#if (NGX_HAVE_KQUEUE)
if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
rev->available -= n;
@ -141,131 +146,38 @@ ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain)
return n;
}
if (n < size && !(ngx_event_flags & NGX_USE_GREEDY_EVENT)) {
rev->ready = 0;
}
if (n == 0) {
rev->eof = 1;
}
return n;
}
err = ngx_socket_errno;
if (err == NGX_EAGAIN || err == NGX_EINTR) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
"readv() not ready");
n = NGX_AGAIN;
} else {
n = ngx_connection_error(c, err, "readv() failed");
break;
}
} while (err == NGX_EINTR);
rev->ready = 0;
if (n == NGX_ERROR) {
c->read->error = 1;
}
return n;
}
#else /* ! NGX_HAVE_KQUEUE */
ssize_t
ngx_readv_chain(ngx_connection_t *c, ngx_chain_t *chain)
{
u_char *prev;
ssize_t n, size;
ngx_err_t err;
ngx_array_t vec;
ngx_event_t *rev;
struct iovec *iov, iovs[NGX_IOVS];
prev = NULL;
iov = NULL;
size = 0;
vec.elts = iovs;
vec.nelts = 0;
vec.size = sizeof(struct iovec);
vec.nalloc = NGX_IOVS;
vec.pool = c->pool;
/* coalesce the neighbouring bufs */
while (chain) {
if (prev == chain->buf->last) {
iov->iov_len += chain->buf->end - chain->buf->last;
} else {
if (vec.nelts >= IOV_MAX) {
break;
}
iov = ngx_array_push(&vec);
if (iov == NULL) {
return NGX_ERROR;
}
iov->iov_base = (void *) chain->buf->last;
iov->iov_len = chain->buf->end - chain->buf->last;
}
size += chain->buf->end - chain->buf->last;
prev = chain->buf->end;
chain = chain->next;
}
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
"readv: %d:%d", vec.nelts, iov->iov_len);
rev = c->read;
do {
n = readv(c->fd, (struct iovec *) vec.elts, vec.nelts);
if (n == 0) {
rev->ready = 0;
rev->eof = 1;
return n;
} else if (n > 0) {
if (n < size && !(ngx_event_flags & NGX_USE_GREEDY_EVENT)) {
rev->ready = 0;
}
return n;
}
err = ngx_socket_errno;
if (err == NGX_EAGAIN || err == NGX_EINTR) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
"readv() not ready");
n = NGX_AGAIN;
} else {
n = ngx_connection_error(c, err, "readv() failed");
break;
}
} while (err == NGX_EINTR);
rev->ready = 0;
if (n == NGX_ERROR) {
c->read->error = 1;
}
return n;
}
#endif /* NGX_HAVE_KQUEUE */
if (n < size && !(ngx_event_flags & NGX_USE_GREEDY_EVENT)) {
rev->ready = 0;
}
if (n == 0) {
rev->eof = 1;
}
return n;
}
err = ngx_socket_errno;
if (err == NGX_EAGAIN || err == NGX_EINTR) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
"readv() not ready");
n = NGX_AGAIN;
} else {
n = ngx_connection_error(c, err, "readv() failed");
break;
}
} while (err == NGX_EINTR);
rev->ready = 0;
if (n == NGX_ERROR) {
c->read->error = 1;
}
return n;
}