| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include <grpc/support/port_platform.h> |
| |
| #ifdef GPR_WINSOCK_SOCKET |
| |
| #include <winsock2.h> |
| |
| // must be included after winsock2.h |
| #include <mswsock.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/log_windows.h> |
| #include <grpc/support/string_util.h> |
| |
| #include "src/core/lib/iomgr/iocp_windows.h" |
| #include "src/core/lib/iomgr/iomgr_internal.h" |
| #include "src/core/lib/iomgr/pollset.h" |
| #include "src/core/lib/iomgr/pollset_windows.h" |
| #include "src/core/lib/iomgr/socket_windows.h" |
| |
| grpc_winsocket *grpc_winsocket_create(SOCKET socket, const char *name) { |
| char *final_name; |
| grpc_winsocket *r = gpr_malloc(sizeof(grpc_winsocket)); |
| memset(r, 0, sizeof(grpc_winsocket)); |
| r->socket = socket; |
| gpr_mu_init(&r->state_mu); |
| gpr_asprintf(&final_name, "%s:socket=0x%p", name, r); |
| grpc_iomgr_register_object(&r->iomgr_object, final_name); |
| gpr_free(final_name); |
| grpc_iocp_add_socket(r); |
| return r; |
| } |
| |
| /* Schedule a shutdown of the socket operations. Will call the pending |
| operations to abort them. We need to do that this way because of the |
| various callsites of that function, which happens to be in various |
| mutex hold states, and that'd be unsafe to call them directly. */ |
| void grpc_winsocket_shutdown(grpc_winsocket *winsocket) { |
| /* Grab the function pointer for DisconnectEx for that specific socket. |
| It may change depending on the interface. */ |
| int status; |
| GUID guid = WSAID_DISCONNECTEX; |
| LPFN_DISCONNECTEX DisconnectEx; |
| DWORD ioctl_num_bytes; |
| |
| status = WSAIoctl(winsocket->socket, SIO_GET_EXTENSION_FUNCTION_POINTER, |
| &guid, sizeof(guid), &DisconnectEx, sizeof(DisconnectEx), |
| &ioctl_num_bytes, NULL, NULL); |
| |
| if (status == 0) { |
| DisconnectEx(winsocket->socket, NULL, 0, 0); |
| } else { |
| char *utf8_message = gpr_format_message(WSAGetLastError()); |
| gpr_log(GPR_ERROR, "Unable to retrieve DisconnectEx pointer : %s", |
| utf8_message); |
| gpr_free(utf8_message); |
| } |
| closesocket(winsocket->socket); |
| } |
| |
| static void destroy(grpc_winsocket *winsocket) { |
| grpc_iomgr_unregister_object(&winsocket->iomgr_object); |
| gpr_mu_destroy(&winsocket->state_mu); |
| gpr_free(winsocket); |
| } |
| |
| static bool check_destroyable(grpc_winsocket *winsocket) { |
| return winsocket->destroy_called == true && |
| winsocket->write_info.closure == NULL && |
| winsocket->read_info.closure == NULL; |
| } |
| |
| void grpc_winsocket_destroy(grpc_winsocket *winsocket) { |
| gpr_mu_lock(&winsocket->state_mu); |
| GPR_ASSERT(!winsocket->destroy_called); |
| winsocket->destroy_called = true; |
| bool should_destroy = check_destroyable(winsocket); |
| gpr_mu_unlock(&winsocket->state_mu); |
| if (should_destroy) destroy(winsocket); |
| } |
| |
| /* Calling notify_on_read or write means either of two things: |
| -) The IOCP already completed in the background, and we need to call |
| the callback now. |
| -) The IOCP hasn't completed yet, and we're queuing it for later. */ |
| static void socket_notify_on_iocp(grpc_exec_ctx *exec_ctx, |
| grpc_winsocket *socket, grpc_closure *closure, |
| grpc_winsocket_callback_info *info) { |
| GPR_ASSERT(info->closure == NULL); |
| gpr_mu_lock(&socket->state_mu); |
| if (info->has_pending_iocp) { |
| info->has_pending_iocp = 0; |
| grpc_exec_ctx_sched(exec_ctx, closure, GRPC_ERROR_NONE, NULL); |
| } else { |
| info->closure = closure; |
| } |
| gpr_mu_unlock(&socket->state_mu); |
| } |
| |
| void grpc_socket_notify_on_write(grpc_exec_ctx *exec_ctx, |
| grpc_winsocket *socket, |
| grpc_closure *closure) { |
| socket_notify_on_iocp(exec_ctx, socket, closure, &socket->write_info); |
| } |
| |
| void grpc_socket_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_winsocket *socket, |
| grpc_closure *closure) { |
| socket_notify_on_iocp(exec_ctx, socket, closure, &socket->read_info); |
| } |
| |
| void grpc_socket_become_ready(grpc_exec_ctx *exec_ctx, grpc_winsocket *socket, |
| grpc_winsocket_callback_info *info) { |
| GPR_ASSERT(!info->has_pending_iocp); |
| gpr_mu_lock(&socket->state_mu); |
| if (info->closure) { |
| grpc_exec_ctx_sched(exec_ctx, info->closure, GRPC_ERROR_NONE, NULL); |
| info->closure = NULL; |
| } else { |
| info->has_pending_iocp = 1; |
| } |
| bool should_destroy = check_destroyable(socket); |
| gpr_mu_unlock(&socket->state_mu); |
| if (should_destroy) destroy(socket); |
| } |
| |
| #endif /* GPR_WINSOCK_SOCKET */ |