int uv_pipe_read_start(uv_pipe_t* handle, uv_alloc_cb alloc_cb, uv_read_cb read_cb) {
if (!(handle->flags & UV_HANDLE_CONNECTION)) {
uv_set_error(UV_EINVAL, 0);
return -1;
}
if (handle->flags & UV_HANDLE_READING) {
uv_set_error(UV_EALREADY, 0);
return -1;
}
if (handle->flags & UV_HANDLE_EOF) {
uv_set_error(UV_EOF, 0);
return -1;
}
handle->flags |= UV_HANDLE_READING;
handle->read_cb = read_cb;
handle->alloc_cb = alloc_cb;
/* If reading was stopped and then started again, there could stell be a */
/* read request pending. */
if (!(handle->flags & UV_HANDLE_READ_PENDING))
uv_pipe_queue_read(handle);
return 0;
}
/* Starts listening for connections for the given pipe. */
int uv_pipe_listen(uv_pipe_t* handle, int backlog, uv_connection_cb cb) {
int i, errno;
uv_pipe_accept_t* req;
HANDLE pipeHandle;
if (handle->flags & UV_HANDLE_BIND_ERROR) {
uv_set_error(UV_EINVAL, 0);
return -1;
}
if (!(handle->flags & UV_HANDLE_BOUND) &&
!(handle->flags & UV_HANDLE_GIVEN_OS_HANDLE)) {
uv_set_error(UV_EINVAL, 0);
return -1;
}
if (handle->flags & UV_HANDLE_LISTENING ||
handle->flags & UV_HANDLE_READING) {
uv_set_error(UV_EALREADY, 0);
return -1;
}
if (!(handle->flags & UV_HANDLE_PIPESERVER) &&
!(handle->flags & UV_HANDLE_GIVEN_OS_HANDLE)) {
uv_set_error(UV_ENOTSUP, 0);
return -1;
}
handle->flags |= UV_HANDLE_LISTENING;
handle->connection_cb = cb;
if (handle->flags & UV_HANDLE_GIVEN_OS_HANDLE) {
handle->flags |= UV_HANDLE_PIPESERVER;
pipeHandle = handle->handle;
assert(pipeHandle != INVALID_HANDLE_VALUE);
req = &handle->accept_reqs[0];
uv_req_init((uv_req_t*) req);
req->pipeHandle = pipeHandle;
req->type = UV_ACCEPT;
req->data = handle;
req->next_pending = NULL;
if (uv_set_pipe_handle(handle, pipeHandle)) {
uv_set_sys_error(GetLastError());
return -1;
}
uv_pipe_queue_accept(handle, req, TRUE);
} else {
/* First pipe handle should have already been created in uv_pipe_bind */
assert(handle->accept_reqs[0].pipeHandle != INVALID_HANDLE_VALUE);
for (i = 0; i < COUNTOF(handle->accept_reqs); i++) {
uv_pipe_queue_accept(handle, &handle->accept_reqs[i], i == 0);
}
}
return 0;
}
int uv_pipe_write(uv_write_t* req, uv_pipe_t* handle, uv_buf_t bufs[], int bufcnt,
uv_write_cb cb) {
int result;
if (bufcnt != 1) {
uv_set_error(UV_ENOTSUP, 0);
return -1;
}
assert(handle->handle != INVALID_HANDLE_VALUE);
if (!(handle->flags & UV_HANDLE_CONNECTION)) {
uv_set_error(UV_EINVAL, 0);
return -1;
}
if (handle->flags & UV_HANDLE_SHUTTING) {
uv_set_error(UV_EOF, 0);
return -1;
}
uv_req_init((uv_req_t*) req);
req->type = UV_WRITE;
req->handle = (uv_stream_t*) handle;
req->cb = cb;
memset(&req->overlapped, 0, sizeof(req->overlapped));
result = WriteFile(handle->handle,
bufs[0].base,
bufs[0].len,
NULL,
&req->overlapped);
if (!result && GetLastError() != ERROR_IO_PENDING) {
uv_set_sys_error(GetLastError());
return -1;
}
if (result) {
/* Request completed immediately. */
req->queued_bytes = 0;
} else {
/* Request queued by the kernel. */
req->queued_bytes = uv_count_bufs(bufs, bufcnt);
handle->write_queue_size += req->queued_bytes;
}
handle->reqs_pending++;
handle->write_reqs_pending++;
return 0;
}
uv_stream_t* uv_std_handle(uv_loop_t* loop, uv_std_type type) {
HANDLE handle;
switch (type) {
case UV_STDIN:
handle = GetStdHandle(STD_INPUT_HANDLE);
if (handle == INVALID_HANDLE_VALUE) {
return NULL;
}
/* Assume only named pipes for now. */
return (uv_stream_t*)uv_make_pipe_for_std_handle(loop, handle);
break;
case UV_STDOUT:
return NULL;
break;
case UV_STDERR:
return NULL;
break;
default:
assert(0);
uv_set_error(loop, UV_EINVAL, 0);
return NULL;
}
}
static void uv_pipe_read_eof(uv_pipe_t* handle, uv_buf_t buf) {
/* If there is an eof timer running, we don't need it any more, */
/* so discard it. */
eof_timer_destroy(handle);
handle->flags |= UV_HANDLE_EOF;
uv_read_stop((uv_stream_t*) handle);
uv_set_error(UV_EOF, 0);
handle->read_cb((uv_stream_t*) handle, -1, uv_null_buf_);
}
/* Starts listening for connections for the given pipe. */
int uv_pipe_listen(uv_pipe_t* handle, uv_connection_cb cb) {
int i, errno;
if (handle->flags & UV_HANDLE_BIND_ERROR) {
LOOP->last_error = handle->error;
return -1;
}
if (!(handle->flags & UV_HANDLE_BOUND)) {
uv_set_error(UV_ENOTCONN, 0);
return -1;
}
if (handle->flags & UV_HANDLE_LISTENING ||
handle->flags & UV_HANDLE_READING) {
uv_set_error(UV_EALREADY, 0);
return -1;
}
if (!(handle->flags & UV_HANDLE_PIPESERVER)) {
uv_set_error(UV_ENOTSUP, 0);
return -1;
}
handle->flags |= UV_HANDLE_LISTENING;
handle->connection_cb = cb;
/* First pipe handle should have already been created in uv_pipe_bind */
assert(handle->accept_reqs[0].pipeHandle != INVALID_HANDLE_VALUE);
for (i = 0; i < COUNTOF(handle->accept_reqs); i++) {
uv_pipe_queue_accept(handle, &handle->accept_reqs[i], i == 0);
}
return 0;
}
/* Creates a pipe server. */
int uv_pipe_bind(uv_pipe_t* handle, const char* name) {
int i, errno, nameSize;
uv_pipe_accept_t* req;
if (handle->flags & UV_HANDLE_BOUND) {
uv_set_sys_error(WSAEINVAL);
return -1;
}
if (!name) {
uv_set_sys_error(WSAEINVAL);
return -1;
}
for (i = 0; i < COUNTOF(handle->accept_reqs); i++) {
req = &handle->accept_reqs[i];
uv_req_init((uv_req_t*) req);
req->type = UV_ACCEPT;
req->data = handle;
req->pipeHandle = INVALID_HANDLE_VALUE;
req->next_pending = NULL;
}
/* Convert name to UTF16. */
nameSize = uv_utf8_to_utf16(name, NULL, 0) * sizeof(wchar_t);
handle->name = (wchar_t*)malloc(nameSize);
if (!handle->name) {
uv_fatal_error(ERROR_OUTOFMEMORY, "malloc");
}
if (!uv_utf8_to_utf16(name, handle->name, nameSize / sizeof(wchar_t))) {
uv_set_sys_error(GetLastError());
return -1;
}
/*
* Attempt to create the first pipe with FILE_FLAG_FIRST_PIPE_INSTANCE.
* If this fails then there's already a pipe server for the given pipe name.
*/
handle->accept_reqs[0].pipeHandle = CreateNamedPipeW(handle->name,
PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED | FILE_FLAG_FIRST_PIPE_INSTANCE,
PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT,
PIPE_UNLIMITED_INSTANCES,
65536,
65536,
0,
NULL);
if (handle->accept_reqs[0].pipeHandle == INVALID_HANDLE_VALUE) {
errno = GetLastError();
if (errno == ERROR_ACCESS_DENIED) {
uv_set_error(UV_EADDRINUSE, errno);
handle->error = LOOP->last_error;
handle->flags |= UV_HANDLE_BIND_ERROR;
} else if (errno == ERROR_PATH_NOT_FOUND || errno == ERROR_INVALID_NAME) {
uv_set_error(UV_EACCESS, errno);
} else {
uv_set_sys_error(errno);
}
goto error;
}
if (uv_set_pipe_handle(handle, handle->accept_reqs[0].pipeHandle)) {
uv_set_sys_error(GetLastError());
goto error;
}
handle->flags |= UV_HANDLE_PIPESERVER;
handle->flags |= UV_HANDLE_BOUND;
return 0;
error:
if (handle->name) {
free(handle->name);
handle->name = NULL;
}
if (handle->accept_reqs[0].pipeHandle != INVALID_HANDLE_VALUE) {
CloseHandle(handle->accept_reqs[0].pipeHandle);
handle->accept_reqs[0].pipeHandle = INVALID_HANDLE_VALUE;
}
return -1;
}
static int uv_create_stdio_pipe_pair(uv_pipe_t* server_pipe, HANDLE* child_pipe, DWORD server_access, DWORD child_access) {
int err;
SECURITY_ATTRIBUTES sa = { sizeof(SECURITY_ATTRIBUTES), NULL, TRUE };
char pipe_name[64];
DWORD mode = PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT;
if (server_pipe->type != UV_NAMED_PIPE) {
uv_set_error(UV_EINVAL, 0);
err = -1;
goto done;
}
/* Create server pipe handle. */
err = uv_stdio_pipe_server(server_pipe, server_access, pipe_name, sizeof(pipe_name));
if (err) {
goto done;
}
/* Create child pipe handle. */
*child_pipe = CreateFileA(pipe_name,
child_access,
0,
&sa,
OPEN_EXISTING,
0,
NULL);
if (*child_pipe == INVALID_HANDLE_VALUE) {
uv_set_sys_error(GetLastError());
err = -1;
goto done;
}
if (!SetNamedPipeHandleState(*child_pipe, &mode, NULL, NULL)) {
uv_set_sys_error(GetLastError());
err = -1;
goto done;
}
/* Do a blocking ConnectNamedPipe. This should not block because
* we have both ends of the pipe created.
*/
if (!ConnectNamedPipe(server_pipe->handle, NULL)) {
if (GetLastError() != ERROR_PIPE_CONNECTED) {
uv_set_sys_error(GetLastError());
err = -1;
goto done;
}
}
err = 0;
done:
if (err) {
if (server_pipe->handle != INVALID_HANDLE_VALUE) {
close_pipe(server_pipe, NULL, NULL);
}
if (*child_pipe != INVALID_HANDLE_VALUE) {
CloseHandle(*child_pipe);
*child_pipe = INVALID_HANDLE_VALUE;
}
}
return err;
}