本文整理汇总了C++中do_sendfile函数的典型用法代码示例。如果您正苦于以下问题：C++ do_sendfile函数的具体用法？C++ do_sendfile怎么用？C++ do_sendfile使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了do_sendfile函数的12个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: t_sendfile
/*
* Use the sendfile systemcall to move size bytes data from
* source to dest. This works only if source is a regular
* file and dest is a socket. If size is -1 data will be
* moved until the end of source is reached. Source and dest
* must be given as Integer.
*/
VALUE t_sendfile(VALUE self, VALUE in, VALUE out, VALUE size)
{
int s, d;
int si;
s= NUM2INT(in);
d= NUM2INT(out);
si= NUM2INT(size);
//deactivate O_NONBLOCK
int flags_s= fcntl(s, F_GETFL);
int flags_d= fcntl(d, F_GETFL);
fcntl(s, F_SETFL, 0);
fcntl(d, F_SETFL, 0);
size_t last;
size_t send= 0;
if (size == -1) { // send everything
while ((last= do_sendfile(d, s, SENDFILE_MAX)) < 0)
send+= last;
} else { // send only the bytes requested
while (si > 0) {
last= do_sendfile(d, s, min(si, SENDFILE_MAX));
send+= last;
if (last == 0) // the end of the file
break;
}
}
fcntl(s, F_SETFL, flags_s);
fcntl(d, F_SETFL, flags_d);
return INT2NUM(send);
}示例2: SYSCALL_DEFINE4
SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd, loff_t __user *, offset, size_t, count)
{
loff_t pos;
ssize_t ret;
if (offset) {
if (unlikely(copy_from_user(&pos, offset, sizeof(loff_t))))
return -EFAULT;
ret = do_sendfile(out_fd, in_fd, &pos, count, 0);
if (unlikely(put_user(pos, offset)))
return -EFAULT;
return ret;
}
return do_sendfile(out_fd, in_fd, NULL, count, 0);
}示例3: main
int main(int ac, char **av)
{
int i;
int lc;
char *msg; /* parse_opts() return message */
if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) {
tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
}
#ifdef UCLINUX
argv0 = av[0];
maybe_run_child(&do_child, "");
#endif
setup();
/*
* The following loop checks looping state if -c option given
*/
for (lc = 0; TEST_LOOPING(lc); lc++) {
tst_count = 0;
for (i = 0; i < TST_TOTAL; ++i) {
do_sendfile(testcases[i].protection,
testcases[i].pass_unmapped_buffer);
}
}
cleanup();
tst_exit();
}示例4: main
int main(int ac, char **av)
{
int i;
int lc; /* loop counter */
char *msg; /* parse_opts() return message */
if ((msg = parse_opts(ac, av, (option_t *) NULL, NULL)) != (char *)NULL) {
tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
/*NOTREACHED*/}
#ifdef UCLINUX
argv0 = av[0];
maybe_run_child(&do_child, "");
#endif
setup();
/*
* The following loop checks looping state if -c option given
*/
for (lc = 0; TEST_LOOPING(lc); lc++) {
Tst_count = 0;
for (i = 0; i < TST_TOTAL; ++i) {
do_sendfile(testcases[i].offset, i);
}
}
cleanup();
/*NOTREACHED*/ return 0;
}示例5: main
int main(int ac, char **av)
{
int lc;
char *msg; /* parse_opts() return message */
if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) {
tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
}
#ifdef UCLINUX
argv0 = av[0];
maybe_run_child(&do_child, "");
#endif
setup();
/*
* The following loop checks looping state if -c option given
*/
for (lc = 0; TEST_LOOPING(lc); lc++) {
tst_count = 0;
do_sendfile();
}
cleanup();
tst_exit();
}示例6: main
int main(int ac, char **av)
{
int i;
int lc;
tst_parse_opts(ac, av, NULL, NULL);
#ifdef UCLINUX
argv0 = av[0];
maybe_run_child(&do_child, "");
#endif
setup();
/*
* The following loop checks looping state if -c option given
*/
for (lc = 0; TEST_LOOPING(lc); lc++) {
tst_count = 0;
for (i = 0; i < TST_TOTAL; ++i) {
do_sendfile(testcases[i].protection,
testcases[i].pass_unmapped_buffer);
}
}
cleanup();
tst_exit();
}示例7: on_write_sendfile
static write_state
on_write_sendfile(struct ev_loop* mainloop, Request* request)
{
/* A sendfile response is split into two phases:
* Phase A) sending HTTP headers
* Phase B) sending the actual file contents
*/
if(request->current_chunk) {
/* Phase A) -- current_chunk contains the HTTP headers */
if (do_send_chunk(request)) {
// data left to send in the current chunk
return not_yet_done;
} else {
assert(request->current_chunk == NULL);
assert(request->current_chunk_p == 0);
/* Transition to Phase B) -- abuse current_chunk_p to store the file fd */
request->current_chunk_p = PyObject_AsFileDescriptor(request->iterable);
// don't stop yet, Phase B is still missing
return not_yet_done;
}
} else {
/* Phase B) -- current_chunk_p contains file fd */
if (do_sendfile(request)) {
// Haven't reached the end of file yet
return not_yet_done;
} else {
// Done with the file
return done;
}
}
}示例8: SYSCALL_DEFINE4
SYSCALL_DEFINE4(sendfile, int, out_fd, int, in_fd, off_t __user *, offset, size_t, count)
{
loff_t pos;
off_t off;
ssize_t ret;
if (offset) {
if (unlikely(get_user(off, offset)))
return -EFAULT;
pos = off;
/* modified start pling 12/04/2009 */
#ifdef SAMBA_ENABLE
ret = do_sendfile(out_fd, in_fd, &pos, count, (loff_t)0xFFFFFFFFUL);
#else
ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS);
#endif
/* modified end pling 12/04/2009 */
if (unlikely(put_user(pos, offset)))
return -EFAULT;
return ret;
}
return do_sendfile(out_fd, in_fd, NULL, count, 0);
}示例9: main
int main(void)
{
struct stat stat;
int fd,size;
int client_sock;
fd=open("./data",O_RDONLY);
if (fstat(fd, &stat)) {
perror("fstat\n");
exit(1);
}
size = stat.st_size;
printf("file size = %d\n", size);
client_sock = socket_create();
do_sendfile(client_sock, fd, 0, FILE_SIZE);
close(client_sock);
close(fd);
return 0;
}示例10: vsf_sysutil_sendfile
int
vsf_sysutil_sendfile(const int out_fd, const int in_fd,
filesize_t* p_offset, filesize_t num_send,
unsigned int max_chunk)
{
/* Grr - why is off_t signed? */
if (*p_offset < 0 || num_send < 0)
{
die("invalid offset or send count in vsf_sysutil_sendfile");
}
if (max_chunk == 0)
{
max_chunk = INT_MAX;
}
while (num_send > 0)
{
int retval;
unsigned int send_this_time;
if (num_send > max_chunk)
{
send_this_time = max_chunk;
}
else
{
send_this_time = (unsigned int) num_send;
}
/* Keep input file position in line with sendfile() calls */
vsf_sysutil_lseek_to(in_fd, *p_offset);
retval = do_sendfile(out_fd, in_fd, send_this_time, *p_offset);
if (vsf_sysutil_retval_is_error(retval) || retval == 0)
{
return retval;
}
num_send -= retval;
*p_offset += retval;
}
return 0;
}示例11: ev_io_on_write
/* XXX too many gotos */
static void
ev_io_on_write(struct ev_loop* mainloop, ev_io* watcher, const int events)
{
Request* request = REQUEST_FROM_WATCHER(watcher);
GIL_LOCK(0);
if(request->state.use_sendfile) {
/* sendfile */
if(request->current_chunk) {
/* current_chunk contains the HTTP headers */
if(send_chunk(request))
goto out;
assert(!request->current_chunk_p);
/* abuse current_chunk_p to store the file fd */
request->current_chunk_p = PyObject_AsFileDescriptor(request->iterable);
goto out;
}
if(do_sendfile(request))
goto out;
} else {
/* iterable */
if(send_chunk(request))
goto out;
if(request->iterator) {
PyObject* next_chunk;
next_chunk = wsgi_iterable_get_next_chunk(request);
if(next_chunk) {
if(request->state.chunked_response) {
request->current_chunk = wrap_http_chunk_cruft_around(next_chunk);
Py_DECREF(next_chunk);
} else {
request->current_chunk = next_chunk;
}
assert(request->current_chunk_p == 0);
goto out;
} else {
if(PyErr_Occurred()) {
PyErr_Print();
/* We can't do anything graceful here because at least one
* chunk is already sent... just close the connection */
DBG_REQ(request, "Exception in iterator, can not recover");
ev_io_stop(mainloop, &request->ev_watcher);
close(request->client_fd);
Request_free(request);
goto out;
}
Py_CLEAR(request->iterator);
}
}
if(request->state.chunked_response) {
/* We have to send a terminating empty chunk + \r\n */
request->current_chunk = PyString_FromString("0\r\n\r\n");
assert(request->current_chunk_p == 0);
request->state.chunked_response = false;
goto out;
}
}
ev_io_stop(mainloop, &request->ev_watcher);
if(request->state.keep_alive) {
DBG_REQ(request, "done, keep-alive");
Request_clean(request);
Request_reset(request);
ev_io_init(&request->ev_watcher, &ev_io_on_read,
request->client_fd, EV_READ);
ev_io_start(mainloop, &request->ev_watcher);
} else {
DBG_REQ(request, "done, close");
close(request->client_fd);
Request_free(request);
}
out:
GIL_UNLOCK(0);
}示例12: io_write
static void io_write(Request* request)
{
//GIL_LOCK(0);
if(request->state.use_sendfile) {
dprint("发送文件给客户端");
/* sendfile */
if(request->current_chunk && send_chunk(request))
goto out;
/* abuse current_chunk_p to store the file fd */
request->current_chunk_p = PyObject_AsFileDescriptor(request->iterable);
if(do_sendfile(request))
goto out;
} else {
dprint("发送字符");
/* iterable */
if(send_chunk(request)){
dprint("一次发送即完成");
//uv_close((uv_handle_t*) &request->ev_watcher, _http_uv__on_close__cb);
goto out;
}
if(request->iterator) {
PyObject* next_chunk;
dprint("request迭代");
next_chunk = wsgi_iterable_get_next_chunk(request);
if(next_chunk) {
dprint("下一块chunk发送");
if(request->state.chunked_response) {
request->current_chunk = wrap_http_chunk_cruft_around(next_chunk);
Py_DECREF(next_chunk);
} else {
request->current_chunk = next_chunk;
}
assert(request->current_chunk_p == 0);
//io_write(request);
goto out;
} else {
if(PyErr_Occurred()) {
uv_err_t err;
dprint("迭代出错");
PyErr_Print();
DBG_REQ(request, "Exception in iterator, can not recover");
uv_close((uv_handle_t*) request->ev_watcher, on_close);
Request_free(request);
err = uv_last_error(loop);
UVERR(err, "uv_write error on next chunk");
ASSERT(0);
goto out;
}
dprint("没有下一块chunk");
Py_CLEAR(request->iterator);
}
}
if(request->state.chunked_response) {
dprint("如果是chunked_response 发送收尾数据,并置空chunked_response");
/* We have to send a terminating empty chunk + \r\n */
request->current_chunk = PyString_FromString("0\r\n\r\n");
assert(request->current_chunk_p == 0);
//io_write(request);
request->state.chunked_response = false;
goto out;
}
}
dprint("响应完成");
if(request->state.keep_alive) {
DBG_REQ(request, "done, keep-alive");
Request_clean(request);
Request_reset(request);
} else {
dprint("done not keep alive");
uv_close((uv_handle_t*) request->ev_watcher, on_close);
Request_free(request);
}
out:
dprint("本次字符发送结束");
//GIL_UNLOCK(0);
return;
}