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#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_file.h>
ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset)
{
ssize_t n;
ngx_log_debug(file->log, "read: %x, %d, %qd" _ buf _ size _ offset);
n = pread(file->fd, buf, size, offset);
if (n == -1) {
ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "read() failed");
return NGX_ERROR;
}
file->offset += n;
return n;
}
#if 0
ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset)
{
if (!file->read->ready) {
ngx_memzero(&file->iocb, sizeof(iocb));
file->iocb.aio_fildes = file->fd;
file->iocb.aio_buf = buf;
file->iocb.aio_nbytes = size;
file->iocb.aio_offset = offset;
#if (USE_AIO_KQUEUE)
file->iocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
file->iocb.aio_sigevent.sigev_notify_kqueue = tid->kq;
file->iocb.aio_sigevent.sigev_value = (union sigval) file;
#endif
#if (USE_AIO_SIGNAL)
file->iocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
file->iocb.aio_sigevent.sigev_signo = NGX_SIGAIO;
#ifndef __FreeBSD__
file->iocb.aio_sigevent.sigev_value.sival_ptr = file;
#endif
#endif
if (aio_read(&file->iocb) == -1) {
ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno,
"aio_read() failed");
return NGX_ERROR;
n = aio_error(&file->iocb);
if (n == EINPROGRESS)
return NGX_AGAIN;
if (n == -1) {
ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno,
"aio_read() failed");
return NGX_ERROR;
}
}
ngx_assert(file->iocb.aio_buf == buf), return NGX_ERROR,
"ngx_aio_read_file: another buffer is passed");
n = aio_return(&file->iocb);
if (n == -1) {
ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno,
"aio_read() failed");
return NGX_ERROR;
}
return n;
}
#endif
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