| /* |
| * |
| * 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/alloc.h> |
| #include <grpc/support/log.h> |
| #include "src/core/lib/iomgr/endpoint.h" |
| |
| typedef struct endpoint_ll_node { |
| grpc_endpoint *ep; |
| struct endpoint_ll_node *next; |
| } endpoint_ll_node; |
| |
| static endpoint_ll_node *head = NULL; |
| static gpr_mu g_endpoint_mutex; |
| |
| void grpc_network_status_shutdown(void) { |
| if (head != NULL) { |
| gpr_log(GPR_ERROR, |
| "Memory leaked as not all network endpoints were shut down"); |
| } |
| gpr_mu_destroy(&g_endpoint_mutex); |
| } |
| |
| void grpc_network_status_init(void) { |
| gpr_mu_init(&g_endpoint_mutex); |
| // TODO(makarandd): Install callback with OS to monitor network status. |
| } |
| |
| void grpc_destroy_network_status_monitor() { |
| for (endpoint_ll_node *curr = head; curr != NULL;) { |
| endpoint_ll_node *next = curr->next; |
| gpr_free(curr); |
| curr = next; |
| } |
| gpr_mu_destroy(&g_endpoint_mutex); |
| } |
| |
| void grpc_network_status_register_endpoint(grpc_endpoint *ep) { |
| gpr_mu_lock(&g_endpoint_mutex); |
| if (head == NULL) { |
| head = (endpoint_ll_node *)gpr_malloc(sizeof(endpoint_ll_node)); |
| head->ep = ep; |
| head->next = NULL; |
| } else { |
| endpoint_ll_node *prev_head = head; |
| head = (endpoint_ll_node *)gpr_malloc(sizeof(endpoint_ll_node)); |
| head->ep = ep; |
| head->next = prev_head; |
| } |
| gpr_mu_unlock(&g_endpoint_mutex); |
| } |
| |
| void grpc_network_status_unregister_endpoint(grpc_endpoint *ep) { |
| gpr_mu_lock(&g_endpoint_mutex); |
| GPR_ASSERT(head); |
| bool found = false; |
| endpoint_ll_node *prev = head; |
| // if we're unregistering the head, just move head to the next |
| if (ep == head->ep) { |
| head = head->next; |
| gpr_free(prev); |
| found = true; |
| } else { |
| for (endpoint_ll_node *curr = head->next; curr != NULL; curr = curr->next) { |
| if (ep == curr->ep) { |
| prev->next = curr->next; |
| gpr_free(curr); |
| found = true; |
| break; |
| } |
| prev = curr; |
| } |
| } |
| gpr_mu_unlock(&g_endpoint_mutex); |
| GPR_ASSERT(found); |
| } |
| |
| // Walk the linked-list from head and execute shutdown. It is possible that |
| // other threads might be in the process of shutdown as well, but that has |
| // no side effect since endpoint shutdown is idempotent. |
| void grpc_network_status_shutdown_all_endpoints() { |
| gpr_mu_lock(&g_endpoint_mutex); |
| if (head == NULL) { |
| gpr_mu_unlock(&g_endpoint_mutex); |
| return; |
| } |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| |
| for (endpoint_ll_node *curr = head; curr != NULL; curr = curr->next) { |
| curr->ep->vtable->shutdown(&exec_ctx, curr->ep, |
| GRPC_ERROR_CREATE("Network unavailable")); |
| } |
| gpr_mu_unlock(&g_endpoint_mutex); |
| grpc_exec_ctx_finish(&exec_ctx); |
| } |