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 | |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 34 | #include <grpc/support/alloc.h> |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 35 | #include <grpc/support/log.h> |
Makarand Dharmapurikar | 932d027 | 2016-06-22 16:17:15 -0700 | [diff] [blame] | 36 | #include "src/core/lib/iomgr/endpoint.h" |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 37 | |
| 38 | typedef struct endpoint_ll_node { |
| 39 | grpc_endpoint *ep; |
| 40 | struct endpoint_ll_node *next; |
| 41 | } endpoint_ll_node; |
| 42 | |
| 43 | static endpoint_ll_node *head = NULL; |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 44 | static gpr_mu g_endpoint_mutex; |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 45 | |
Craig Tiller | f11b333 | 2016-07-14 16:48:23 -0700 | [diff] [blame] | 46 | void grpc_network_status_shutdown(void) { |
Craig Tiller | ce14c30 | 2016-07-01 09:06:38 -0700 | [diff] [blame] | 47 | if (head != NULL) { |
| 48 | gpr_log(GPR_ERROR, |
Masood Malekghassemi | 4253c1e | 2016-11-03 15:20:45 -0700 | [diff] [blame] | 49 | "Memory leaked as not all network endpoints were shut down"); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 50 | } |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 51 | gpr_mu_destroy(&g_endpoint_mutex); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 52 | } |
| 53 | |
Craig Tiller | f11b333 | 2016-07-14 16:48:23 -0700 | [diff] [blame] | 54 | void grpc_network_status_init(void) { |
Craig Tiller | ce14c30 | 2016-07-01 09:06:38 -0700 | [diff] [blame] | 55 | gpr_mu_init(&g_endpoint_mutex); |
Craig Tiller | ce14c30 | 2016-07-01 09:06:38 -0700 | [diff] [blame] | 56 | // TODO(makarandd): Install callback with OS to monitor network status. |
| 57 | } |
| 58 | |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 59 | void grpc_destroy_network_status_monitor() { |
| 60 | for (endpoint_ll_node *curr = head; curr != NULL;) { |
| 61 | endpoint_ll_node *next = curr->next; |
| 62 | gpr_free(curr); |
| 63 | curr = next; |
| 64 | } |
| 65 | gpr_mu_destroy(&g_endpoint_mutex); |
| 66 | } |
| 67 | |
| 68 | void grpc_network_status_register_endpoint(grpc_endpoint *ep) { |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 69 | gpr_mu_lock(&g_endpoint_mutex); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 70 | if (head == NULL) { |
| 71 | head = (endpoint_ll_node *)gpr_malloc(sizeof(endpoint_ll_node)); |
| 72 | head->ep = ep; |
| 73 | head->next = NULL; |
| 74 | } else { |
| 75 | endpoint_ll_node *prev_head = head; |
| 76 | head = (endpoint_ll_node *)gpr_malloc(sizeof(endpoint_ll_node)); |
| 77 | head->ep = ep; |
| 78 | head->next = prev_head; |
| 79 | } |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 80 | gpr_mu_unlock(&g_endpoint_mutex); |
| 81 | } |
| 82 | |
| 83 | void grpc_network_status_unregister_endpoint(grpc_endpoint *ep) { |
| 84 | gpr_mu_lock(&g_endpoint_mutex); |
| 85 | GPR_ASSERT(head); |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 86 | bool found = false; |
| 87 | endpoint_ll_node *prev = head; |
| 88 | // if we're unregistering the head, just move head to the next |
| 89 | if (ep == head->ep) { |
Makarand Dharmapurikar | 932d027 | 2016-06-22 16:17:15 -0700 | [diff] [blame] | 90 | head = head->next; |
| 91 | gpr_free(prev); |
| 92 | found = true; |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 93 | } else { |
| 94 | for (endpoint_ll_node *curr = head->next; curr != NULL; curr = curr->next) { |
| 95 | if (ep == curr->ep) { |
| 96 | prev->next = curr->next; |
| 97 | gpr_free(curr); |
| 98 | found = true; |
| 99 | break; |
| 100 | } |
| 101 | prev = curr; |
| 102 | } |
| 103 | } |
| 104 | gpr_mu_unlock(&g_endpoint_mutex); |
| 105 | GPR_ASSERT(found); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 106 | } |
| 107 | |
| 108 | // Walk the linked-list from head and execute shutdown. It is possible that |
| 109 | // other threads might be in the process of shutdown as well, but that has |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 110 | // no side effect since endpoint shutdown is idempotent. |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 111 | void grpc_network_status_shutdown_all_endpoints() { |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 112 | gpr_mu_lock(&g_endpoint_mutex); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 113 | if (head == NULL) { |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 114 | gpr_mu_unlock(&g_endpoint_mutex); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 115 | return; |
| 116 | } |
| 117 | grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| 118 | |
| 119 | for (endpoint_ll_node *curr = head; curr != NULL; curr = curr->next) { |
Craig Tiller | cda759d | 2017-01-27 11:37:37 -0800 | [diff] [blame] | 120 | curr->ep->vtable->shutdown(&exec_ctx, curr->ep, |
| 121 | GRPC_ERROR_CREATE("Network unavailable")); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 122 | } |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 123 | gpr_mu_unlock(&g_endpoint_mutex); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 124 | grpc_exec_ctx_finish(&exec_ctx); |
| 125 | } |