nginx-0.0.1-2003-05-21-17:28:21 import

1 files changed, 110 insertions, 0 deletions

diff --git a/src/os/unix/ngx_aio_read.c b/src/os/unix/ngx_aio_read.c
new file mode 100644
index 000000000..4896af9ce
--- /dev/null
+++ b/src/os/unix/ngx_aio_read.c
@@ -0,0 +1,110 @@
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_aio.h>
+
+#if (HAVE_KQUEUE)
+#include <ngx_kqueue_module.h>
+#endif
+
+
+/*
+    The data is ready - 3 syscalls:
+        aio_read(), aio_error(), aio_return()
+    The data is not ready - 4 (kqueue) or 5 syscalls:
+        aio_read(), aio_error(), notifiction,
+                                             aio_error(), aio_return()
+                                             aio_cancel(), aio_error()
+*/
+
+
+ssize_t ngx_aio_read(ngx_connection_t *c, char *buf, size_t size)
+{
+    int           rc, first, canceled;
+    ngx_event_t  *ev;
+
+    ev = c->read;
+
+    canceled = 0;
+
+    if (ev->timedout) {
+        ngx_set_socket_errno(NGX_ETIMEDOUT);
+        ngx_log_error(NGX_LOG_ERR, ev->log, 0, "aio_read() timed out");
+
+        rc = aio_cancel(c->fd, &ev->aiocb);
+        if (rc == -1) {
+            ngx_log_error(NGX_LOG_CRIT, ev->log, ngx_errno,
+                          "aio_cancel() failed");
+            return NGX_ERROR;
+        }
+
+        ngx_log_debug(ev->log, "aio_cancel: %d" _ rc);
+
+        canceled = 1;
+
+        ev->ready = 1;
+    }
+
+    first = 0;
+
+    if (!ev->ready) {
+        ngx_memzero(&ev->aiocb, sizeof(struct aiocb));
+
+        ev->aiocb.aio_fildes = c->fd;
+        ev->aiocb.aio_buf = buf;
+        ev->aiocb.aio_nbytes = size;
+
+#if (HAVE_KQUEUE)
+        ev->aiocb.aio_sigevent.sigev_notify_kqueue = ngx_kqueue;
+        ev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
+        ev->aiocb.aio_sigevent.sigev_value.sigval_ptr = ev;
+#endif
+
+        if (aio_read(&ev->aiocb) == -1) {
+            ngx_log_error(NGX_LOG_CRIT, ev->log, ngx_errno,
+                          "aio_read() failed");
+            return NGX_ERROR;
+        }
+
+        ngx_log_debug(ev->log, "aio_read: OK");
+
+        ev->active = 1;
+        first = 1;
+    }
+
+    ev->ready = 0;
+
+    rc = aio_error(&ev->aiocb);
+    if (rc == -1) {
+        ngx_log_error(NGX_LOG_CRIT, ev->log, ngx_errno, "aio_error() failed");
+        return NGX_ERROR;
+    }
+
+    if (rc != 0) {
+        if (rc == NGX_EINPROGRESS) {
+            if (!first) {
+                ngx_log_error(NGX_LOG_CRIT, ev->log, rc,
+                              "aio_read() still in progress");
+            }
+            return NGX_AGAIN;
+        }
+
+        if (rc == NGX_ECANCELED && canceled) {
+            return NGX_ERROR;
+        }
+
+        ngx_log_error(NGX_LOG_CRIT, ev->log, rc, "aio_read() failed");
+        return NGX_ERROR;
+    }
+
+    rc = aio_return(&ev->aiocb);
+    if (rc == -1) {
+        ngx_log_error(NGX_LOG_CRIT, ev->log, ngx_errno, "aio_return() failed");
+
+        return NGX_ERROR;
+    }
+
+    ngx_log_debug(ev->log, "aio_read: %d" _ rc);
+
+    return rc;
+}