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; |
Craig Tiller | ce14c30 | 2016-07-01 09:06:38 -0700 | [diff] [blame] | 45 | static gpr_once g_once_init = GPR_ONCE_INIT; |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 46 | |
Craig Tiller | 590092b | 2016-07-07 11:30:10 -0700 | [diff] [blame] | 47 | static void destroy_network_status_monitor(void) { |
Craig Tiller | ce14c30 | 2016-07-01 09:06:38 -0700 | [diff] [blame] | 48 | if (head != NULL) { |
| 49 | gpr_log(GPR_ERROR, |
| 50 | "Memory leaked as all network endpoints were not shut down"); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 51 | } |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 52 | gpr_mu_destroy(&g_endpoint_mutex); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 53 | } |
| 54 | |
Craig Tiller | 590092b | 2016-07-07 11:30:10 -0700 | [diff] [blame] | 55 | static void initialize_network_status_monitor(void) { |
Craig Tiller | ce14c30 | 2016-07-01 09:06:38 -0700 | [diff] [blame] | 56 | gpr_mu_init(&g_endpoint_mutex); |
| 57 | atexit(destroy_network_status_monitor); |
| 58 | // TODO(makarandd): Install callback with OS to monitor network status. |
| 59 | } |
| 60 | |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 61 | void grpc_network_status_register_endpoint(grpc_endpoint *ep) { |
Craig Tiller | ce14c30 | 2016-07-01 09:06:38 -0700 | [diff] [blame] | 62 | gpr_once_init(&g_once_init, initialize_network_status_monitor); |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 63 | gpr_mu_lock(&g_endpoint_mutex); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 64 | if (head == NULL) { |
| 65 | head = (endpoint_ll_node *)gpr_malloc(sizeof(endpoint_ll_node)); |
| 66 | head->ep = ep; |
| 67 | head->next = NULL; |
| 68 | } else { |
| 69 | endpoint_ll_node *prev_head = head; |
| 70 | head = (endpoint_ll_node *)gpr_malloc(sizeof(endpoint_ll_node)); |
| 71 | head->ep = ep; |
| 72 | head->next = prev_head; |
| 73 | } |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 74 | gpr_mu_unlock(&g_endpoint_mutex); |
| 75 | } |
| 76 | |
| 77 | void grpc_network_status_unregister_endpoint(grpc_endpoint *ep) { |
| 78 | gpr_mu_lock(&g_endpoint_mutex); |
| 79 | GPR_ASSERT(head); |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 80 | bool found = false; |
| 81 | endpoint_ll_node *prev = head; |
| 82 | // if we're unregistering the head, just move head to the next |
| 83 | if (ep == head->ep) { |
Makarand Dharmapurikar | 932d027 | 2016-06-22 16:17:15 -0700 | [diff] [blame] | 84 | head = head->next; |
| 85 | gpr_free(prev); |
| 86 | found = true; |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 87 | } else { |
| 88 | for (endpoint_ll_node *curr = head->next; curr != NULL; curr = curr->next) { |
| 89 | if (ep == curr->ep) { |
| 90 | prev->next = curr->next; |
| 91 | gpr_free(curr); |
| 92 | found = true; |
| 93 | break; |
| 94 | } |
| 95 | prev = curr; |
| 96 | } |
| 97 | } |
| 98 | gpr_mu_unlock(&g_endpoint_mutex); |
| 99 | GPR_ASSERT(found); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | // Walk the linked-list from head and execute shutdown. It is possible that |
| 103 | // 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] | 104 | // no side effect since endpoint shutdown is idempotent. |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 105 | void grpc_network_status_shutdown_all_endpoints() { |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 106 | gpr_mu_lock(&g_endpoint_mutex); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 107 | if (head == NULL) { |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 108 | gpr_mu_unlock(&g_endpoint_mutex); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 109 | return; |
| 110 | } |
| 111 | grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| 112 | |
| 113 | for (endpoint_ll_node *curr = head; curr != NULL; curr = curr->next) { |
| 114 | curr->ep->vtable->shutdown(&exec_ctx, curr->ep); |
| 115 | } |
Makarand Dharmapurikar | 6149443 | 2016-06-22 13:34:59 -0700 | [diff] [blame] | 116 | gpr_mu_unlock(&g_endpoint_mutex); |
Makarand Dharmapurikar | 7981e19 | 2016-06-20 15:38:15 -0700 | [diff] [blame] | 117 | grpc_exec_ctx_finish(&exec_ctx); |
| 118 | } |