Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * |
| 3 | * Copyright 2015, Google Inc. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | #include "src/core/lib/iomgr/endpoint.h" |
| 35 | #include <grpc/support/alloc.h> |
| 36 | |
| 37 | typedef struct endpoint_ll_node { |
| 38 | grpc_endpoint *ep; |
| 39 | struct endpoint_ll_node *next; |
| 40 | } endpoint_ll_node; |
| 41 | |
| 42 | static endpoint_ll_node *head = NULL; |
| 43 | |
| 44 | // TODO(makarandd): Install callback with OS to monitor network status. |
| 45 | void grpc_initialize_network_status_monitor() { |
| 46 | } |
| 47 | |
| 48 | void grpc_destroy_network_status_monitor() { |
| 49 | for (endpoint_ll_node *curr = head; curr != NULL; ) { |
| 50 | endpoint_ll_node *next = curr->next; |
| 51 | gpr_free(curr); |
| 52 | curr = next; |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | void grpc_network_status_register_endpoint(grpc_endpoint *ep) { |
| 57 | if (head == NULL) { |
| 58 | head = (endpoint_ll_node *)gpr_malloc(sizeof(endpoint_ll_node)); |
| 59 | head->ep = ep; |
| 60 | head->next = NULL; |
| 61 | } else { |
| 62 | endpoint_ll_node *prev_head = head; |
| 63 | head = (endpoint_ll_node *)gpr_malloc(sizeof(endpoint_ll_node)); |
| 64 | head->ep = ep; |
| 65 | head->next = prev_head; |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | // Walk the linked-list from head and execute shutdown. It is possible that |
| 70 | // other threads might be in the process of shutdown as well, but that has |
| 71 | // no side effect. |
| 72 | void grpc_network_status_shutdown_all_endpoints() { |
| 73 | if (head == NULL) { |
| 74 | return; |
| 75 | } |
| 76 | grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| 77 | |
| 78 | for (endpoint_ll_node *curr = head; curr != NULL; curr = curr->next) { |
| 79 | curr->ep->vtable->shutdown(&exec_ctx, curr->ep); |
| 80 | } |
| 81 | grpc_exec_ctx_finish(&exec_ctx); |
| 82 | } |