Line data    Source code

       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             : 
      34             : #include "src/core/client_config/lb_policy_registry.h"
      35             : 
      36             : #include <string.h>
      37             : 
      38             : #define MAX_POLICIES 10
      39             : 
      40             : static grpc_lb_policy_factory *g_all_of_the_lb_policies[MAX_POLICIES];
      41             : static int g_number_of_lb_policies = 0;
      42             : 
      43             : static grpc_lb_policy_factory *g_default_lb_policy_factory;
      44             : 
      45        2501 : void grpc_lb_policy_registry_init(grpc_lb_policy_factory *default_factory) {
      46        2501 :   g_number_of_lb_policies = 0;
      47        2501 :   g_default_lb_policy_factory = default_factory;
      48        2501 : }
      49             : 
      50           0 : void grpc_lb_policy_registry_shutdown(void) {
      51             :   int i;
      52           0 :   for (i = 0; i < g_number_of_lb_policies; i++) {
      53           0 :     grpc_lb_policy_factory_unref(g_all_of_the_lb_policies[i]);
      54             :   }
      55           0 : }
      56             : 
      57        5002 : void grpc_register_lb_policy(grpc_lb_policy_factory *factory) {
      58             :   int i;
      59        7503 :   for (i = 0; i < g_number_of_lb_policies; i++) {
      60        2501 :     GPR_ASSERT(0 != strcmp(factory->vtable->name,
      61             :                            g_all_of_the_lb_policies[i]->vtable->name));
      62             :   }
      63        5002 :   GPR_ASSERT(g_number_of_lb_policies != MAX_POLICIES);
      64        5002 :   grpc_lb_policy_factory_ref(factory);
      65        5002 :   g_all_of_the_lb_policies[g_number_of_lb_policies++] = factory;
      66        5002 : }
      67             : 
      68        1445 : static grpc_lb_policy_factory *lookup_factory(const char *name) {
      69             :   int i;
      70             : 
      71        1445 :   if (name == NULL) return NULL;
      72             : 
      73        1450 :   for (i = 0; i < g_number_of_lb_policies; i++) {
      74        1450 :     if (0 == strcmp(name, g_all_of_the_lb_policies[i]->vtable->name)) {
      75        1445 :       return g_all_of_the_lb_policies[i];
      76             :     }
      77             :   }
      78             : 
      79           0 :   return NULL;
      80             : }
      81             : 
      82        1445 : grpc_lb_policy *grpc_lb_policy_create(const char *name,
      83             :                                       grpc_lb_policy_args *args) {
      84        1445 :   grpc_lb_policy_factory *factory = lookup_factory(name);
      85        1445 :   grpc_lb_policy *lb_policy =
      86             :       grpc_lb_policy_factory_create_lb_policy(factory, args);
      87        1445 :   return lb_policy;
      88             : }