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src/os/unix/ngx_aio_read.c - nginx-1.7.10
Functions defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_event.h>
- extern int ngx_kqueue;
- ssize_t
- ngx_aio_read(ngx_connection_t *c, u_char *buf, size_t size)
- {
- int n;
- ngx_event_t *rev;
- rev = c->read;
- if (!rev->ready) {
- ngx_log_error(NGX_LOG_ALERT, c->log, 0, "second aio post");
- return NGX_AGAIN;
- }
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "rev->complete: %d", rev->complete);
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "aio size: %d", size);
- if (!rev->complete) {
- ngx_memzero(&rev->aiocb, sizeof(struct aiocb));
- rev->aiocb.aio_fildes = c->fd;
- rev->aiocb.aio_buf = buf;
- rev->aiocb.aio_nbytes = size;
- #if (NGX_HAVE_KQUEUE)
- rev->aiocb.aio_sigevent.sigev_notify_kqueue = ngx_kqueue;
- rev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
- rev->aiocb.aio_sigevent.sigev_value.sigval_ptr = rev;
- #endif
- if (aio_read(&rev->aiocb) == -1) {
- ngx_log_error(NGX_LOG_CRIT, rev->log, ngx_errno,
- "aio_read() failed");
- rev->error = 1;
- return NGX_ERROR;
- }
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "aio_read: #%d OK", c->fd);
- rev->active = 1;
- rev->ready = 0;
- }
- rev->complete = 0;
- n = aio_error(&rev->aiocb);
- if (n == -1) {
- ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, "aio_error() failed");
- rev->error = 1;
- return NGX_ERROR;
- }
- if (n != 0) {
- if (n == NGX_EINPROGRESS) {
- if (rev->ready) {
- ngx_log_error(NGX_LOG_ALERT, c->log, n,
- "aio_read() still in progress");
- rev->ready = 0;
- }
- return NGX_AGAIN;
- }
- ngx_log_error(NGX_LOG_CRIT, c->log, n, "aio_read() failed");
- rev->error = 1;
- rev->ready = 0;
- return NGX_ERROR;
- }
- n = aio_return(&rev->aiocb);
- if (n == -1) {
- ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
- "aio_return() failed");
- rev->error = 1;
- rev->ready = 0;
- return NGX_ERROR;
- }
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, rev->log, 0,
- "aio_read: #%d %d", c->fd, n);
- if (n == 0) {
- rev->eof = 1;
- rev->ready = 0;
- } else {
- rev->ready = 1;
- }
- rev->active = 0;
- return n;
- }
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