Mercurial > hg > nginx-quic
view src/os/unix/ngx_aio_write.c @ 5650:363395795384
SPDY: moved a variable initialization near to its check.
This should prevent attempts of using pointer before it was checked, since
all modern compilers are able to spot access to uninitialized variable.
No functional changes.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Wed, 09 Apr 2014 18:15:32 +0400 |
parents | d620f497c50f |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> extern int ngx_kqueue; ssize_t ngx_aio_write(ngx_connection_t *c, u_char *buf, size_t size) { int n; ngx_event_t *wev; wev = c->write; if (!wev->ready) { return NGX_AGAIN; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, wev->log, 0, "aio: wev->complete: %d", wev->complete); if (!wev->complete) { ngx_memzero(&wev->aiocb, sizeof(struct aiocb)); wev->aiocb.aio_fildes = c->fd; wev->aiocb.aio_buf = buf; wev->aiocb.aio_nbytes = size; #if (NGX_HAVE_KQUEUE) wev->aiocb.aio_sigevent.sigev_notify_kqueue = ngx_kqueue; wev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT; wev->aiocb.aio_sigevent.sigev_value.sigval_ptr = wev; #endif if (aio_write(&wev->aiocb) == -1) { ngx_log_error(NGX_LOG_CRIT, wev->log, ngx_errno, "aio_write() failed"); return NGX_ERROR; } ngx_log_debug0(NGX_LOG_DEBUG_EVENT, wev->log, 0, "aio_write: OK"); wev->active = 1; wev->ready = 0; } wev->complete = 0; n = aio_error(&wev->aiocb); if (n == -1) { ngx_log_error(NGX_LOG_CRIT, wev->log, ngx_errno, "aio_error() failed"); wev->error = 1; return NGX_ERROR; } if (n != 0) { if (n == NGX_EINPROGRESS) { if (wev->ready) { ngx_log_error(NGX_LOG_ALERT, wev->log, n, "aio_write() still in progress"); wev->ready = 0; } return NGX_AGAIN; } ngx_log_error(NGX_LOG_CRIT, wev->log, n, "aio_write() failed"); wev->error = 1; wev->ready = 0; #if 1 n = aio_return(&wev->aiocb); if (n == -1) { ngx_log_error(NGX_LOG_ALERT, wev->log, ngx_errno, "aio_return() failed"); } ngx_log_error(NGX_LOG_CRIT, wev->log, n, "aio_return() %d", n); #endif return NGX_ERROR; } n = aio_return(&wev->aiocb); if (n == -1) { ngx_log_error(NGX_LOG_ALERT, wev->log, ngx_errno, "aio_return() failed"); wev->error = 1; wev->ready = 0; return NGX_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, wev->log, 0, "aio_write: %d", n); wev->active = 0; wev->ready = 1; return n; }