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/*
*
* 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 all network endpoints were not 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);
}
gpr_mu_unlock(&g_endpoint_mutex);
grpc_exec_ctx_finish(&exec_ctx);
}
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