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Diffstat (limited to 'src/core/channel/connectivity_state.h')
| -rw-r--r-- | src/core/channel/connectivity_state.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/core/channel/connectivity_state.h b/src/core/channel/connectivity_state.h new file mode 100644 index 0000000000..ebc1acc559 --- /dev/null +++ b/src/core/channel/connectivity_state.h @@ -0,0 +1,66 @@ +/* + * + * 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_CHANNEL_CONNECTIVITY_STATE_H +#define GRPC_INTERNAL_CORE_CHANNEL_CONNECTIVITY_STATE_H + +#include <grpc/grpc.h> +#include "src/core/iomgr/iomgr.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_iomgr_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; +} grpc_connectivity_state_tracker; + +void grpc_connectivity_state_init(grpc_connectivity_state_tracker *tracker, grpc_connectivity_state init_state); +void grpc_connectivity_state_destroy(grpc_connectivity_state_tracker *tracker); + +void grpc_connectivity_state_set(grpc_connectivity_state_tracker *tracker, grpc_connectivity_state state); + +grpc_connectivity_state grpc_connectivity_state_check(grpc_connectivity_state_tracker *tracker); + +/** Return 1 if the channel should start connecting, 0 otherwise */ +int grpc_connectivity_state_notify_on_state_change(grpc_connectivity_state_tracker *tracker, grpc_connectivity_state *current, grpc_iomgr_closure *notify); + +#endif /* GRPC_INTERNAL_CORE_CHANNEL_CONNECTIVITY_STATE_H */ |