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Merge pull request grpc#6973 from makdharma/network_status_change
Network status tracking
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| /* | ||
| * | ||
| * 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; | ||
| static bool g_init_done = false; | ||
|
|
||
| void grpc_initialize_network_status_monitor() { | ||
| g_init_done = true; | ||
| 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) { | ||
| if (!g_init_done) { | ||
| grpc_initialize_network_status_monitor(); | ||
| } | ||
| 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); | ||
| } | ||
| gpr_mu_unlock(&g_endpoint_mutex); | ||
| grpc_exec_ctx_finish(&exec_ctx); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| /* | ||
| * | ||
| * Copyright 2016, 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. | ||
| * | ||
| */ | ||
|
|
||
| #ifndef GRPC_CORE_LIB_IOMGR_NETWORK_STATUS_TRACKER_H | ||
| #define GRPC_CORE_LIB_IOMGR_NETWORK_STATUS_TRACKER_H | ||
| #include "src/core/lib/iomgr/endpoint.h" | ||
|
|
||
| void grpc_network_status_register_endpoint(grpc_endpoint *ep); | ||
| void grpc_network_status_unregister_endpoint(grpc_endpoint *ep); | ||
| void grpc_network_status_shutdown_all_endpoints(); | ||
| #endif /* GRPC_CORE_LIB_IOMGR_NETWORK_STATUS_TRACKER_H */ |
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