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Add net/shutdown to allow better networking with streams.

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This commit is contained in:
Calvin Rose 2021-03-26 15:36:25 -05:00
parent 37d6cb469b
commit 7c7ff802fa
2 changed files with 54 additions and 2 deletions
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4
src/core/ev.c
View File

@ -1176,7 +1176,7 @@ void janet_loop1_impl(int has_timeout, JanetTimestamp timeout) {
status2 = state->machine(state, JANET_ASYNC_EVENT_READ);
if (mask & EPOLLERR)
status3 = state->machine(state, JANET_ASYNC_EVENT_ERR);
if (mask & EPOLLHUP)
if ((mask & EPOLLHUP) && !(mask & (EPOLLOUT | EPOLLIN)))
status4 = state->machine(state, JANET_ASYNC_EVENT_HUP);
if (status1 == JANET_ASYNC_STATUS_DONE ||
status2 == JANET_ASYNC_STATUS_DONE ||
@ -1306,7 +1306,7 @@ void janet_loop1_impl(int has_timeout, JanetTimestamp timeout) {
status2 = state->machine(state, JANET_ASYNC_EVENT_READ);
if (mask & POLLERR)
status3 = state->machine(state, JANET_ASYNC_EVENT_ERR);
if (mask & POLLHUP)
if ((mask & POLLHUP) && !(mask & (POLLIN | POLLOUT)))
status4 = state->machine(state, JANET_ASYNC_EVENT_HUP);
if (status1 == JANET_ASYNC_STATUS_DONE ||
status2 == JANET_ASYNC_STATUS_DONE ||

52
src/core/net.c
View File

@ -431,6 +431,47 @@ static const char *serverify_socket(JSock sfd) {
return NULL;
}
#ifdef JANET_WINDOWS
#define JANET_SHUTDOWN_RW SD_BOTH
#define JANET_SHUTDOWN_R SD_RECEIVE
#define JANET_SHUTDOWN_W SD_SEND
#else
#define JANET_SHUTDOWN_RW SHUT_RDWR
#define JANET_SHUTDOWN_R SHUT_RD
#define JANET_SHUTDOWN_W SHUT_WR
#endif
static Janet cfun_net_shutdown(int32_t argc, Janet *argv) {
janet_arity(argc, 1, 2);
JanetStream *stream = janet_getabstract(argv, 0, &janet_stream_type);
janet_stream_flags(stream, JANET_STREAM_SOCKET);
int shutdown_type = SHUT_RDWR;
if (argc == 2) {
const uint8_t *kw = janet_getkeyword(argv, 1);
if (0 == janet_cstrcmp(kw, "rw")) {
shutdown_type = JANET_SHUTDOWN_RW;
} else if (0 == janet_cstrcmp(kw, "r")) {
shutdown_type = JANET_SHUTDOWN_R;
} else if (0 == janet_cstrcmp(kw, "w")) {
shutdown_type = JANET_SHUTDOWN_W;
} else {
janet_panicf("unexpected keyword %v", argv[1]);
}
}
int status;
#ifdef JANET_WINDOWS
status = shutdown((SOCKET) stream->handle, shutdown_type);
#else
do {
status = shutdown(stream->handle, shutdown_type);
} while (status == -1 && errno == EINTR);
#endif
if (status) {
janet_panicf("could not shutdown socket: %V", janet_ev_lasterr());
}
return argv[0];
}
static Janet cfun_net_listen(int32_t argc, Janet *argv) {
janet_arity(argc, 2, 3);
@ -622,6 +663,7 @@ static const JanetMethod net_stream_methods[] = {
{"evread", janet_cfun_stream_read},
{"evchunk", janet_cfun_stream_chunk},
{"evwrite", janet_cfun_stream_write},
{"shutdown", cfun_net_shutdown},
{NULL, NULL}
};
@ -709,6 +751,16 @@ static const JanetReg net_cfuns[] = {
"that can be used to communicate with the server. Type is an optional keyword "
"to specify a connection type, either :stream or :datagram. The default is :stream. ")
},
{
"net/shutdown", cfun_net_shutdown,
JDOC("(net/shutdown stream &opt mode)\n\n"
"Stop communication on this socket in a graceful manner, either in both directions or just "
"reading/writing from the stream. The `mode` parameter controls which communication to stop on the socket. "
"\n\n* `:wr` is the default and prevents both reading new data from the socket and writing new data to the socket.\n"
"* `:r` disables reading new data from the socket.\n"
"* `:w` disable writing data to the socket.\n\n"
"Returns the original socket.")
},
{NULL, NULL, NULL}
};