| /* |
| * |
| * 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. |
| * |
| */ |
| |
| #ifndef GRPC_INTERNAL_CORE_TRANSPORT_CONNECTIVITY_STATE_H |
| #define GRPC_INTERNAL_CORE_TRANSPORT_CONNECTIVITY_STATE_H |
| |
| #include <grpc/grpc.h> |
| #include "src/core/iomgr/exec_ctx.h" |
| |
| typedef struct grpc_connectivity_state_watcher { |
| /** we keep watchers in a linked list */ |
| struct grpc_connectivity_state_watcher *next; |
| /** closure to notify on change */ |
| grpc_closure *notify; |
| /** the current state as believed by the watcher */ |
| grpc_connectivity_state *current; |
| } grpc_connectivity_state_watcher; |
| |
| typedef struct { |
| /** current connectivity state */ |
| grpc_connectivity_state current_state; |
| /** all our watchers */ |
| grpc_connectivity_state_watcher *watchers; |
| /** a name to help debugging */ |
| char *name; |
| } grpc_connectivity_state_tracker; |
| |
| extern int grpc_connectivity_state_trace; |
| |
| const char *grpc_connectivity_state_name(grpc_connectivity_state state); |
| |
| void grpc_connectivity_state_init(grpc_connectivity_state_tracker *tracker, |
| grpc_connectivity_state init_state, |
| const char *name); |
| void grpc_connectivity_state_destroy(grpc_exec_ctx *exec_ctx, |
| grpc_connectivity_state_tracker *tracker); |
| |
| /** Set connectivity state; not thread safe; access must be serialized with an |
| * external lock */ |
| void grpc_connectivity_state_set(grpc_exec_ctx *exec_ctx, |
| grpc_connectivity_state_tracker *tracker, |
| grpc_connectivity_state state, |
| const char *reason); |
| |
| grpc_connectivity_state grpc_connectivity_state_check( |
| grpc_connectivity_state_tracker *tracker); |
| |
| /** Return 1 if the channel should start connecting, 0 otherwise. |
| If current==NULL cancel notify if it is already queued (success==0 in that |
| case) */ |
| int grpc_connectivity_state_notify_on_state_change( |
| grpc_exec_ctx *exec_ctx, grpc_connectivity_state_tracker *tracker, |
| grpc_connectivity_state *current, grpc_closure *notify); |
| |
| #endif /* GRPC_INTERNAL_CORE_TRANSPORT_CONNECTIVITY_STATE_H */ |