ab3f35b226
And change type name of callback as well. The new name is more accurate. Change-Id: I13b63f7d33f60ecea7fdf6e50f57aa6a391a4562 Signed-off-by: wuzhouhui <wuzhouhui@kingsoft.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453151 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com> Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SPDK_NOTIFY_H
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#define SPDK_NOTIFY_H
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#include "spdk/stdinc.h"
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#include "spdk/json.h"
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#include "spdk/queue.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Opaque event type.
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*/
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struct spdk_notify_type;
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typedef int (*spdk_notify_foreach_type_cb)(const struct spdk_notify_type *type, void *ctx);
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#define SPDK_NOTIFY_MAX_NAME_SIZE 128
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#define SPDK_NOTIFY_MAX_CTX_SIZE 128
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struct spdk_notify_event {
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char type[SPDK_NOTIFY_MAX_NAME_SIZE];
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char ctx[SPDK_NOTIFY_MAX_CTX_SIZE];
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};
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/**
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* Callback type for event enumeration.
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*
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* \param idx Event index
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* \param event Event data
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* \param ctx User context
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* \return Non zero to break iteration.
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*/
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typedef int (*spdk_notify_foreach_event_cb)(uint64_t idx, const struct spdk_notify_event *event,
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void *ctx);
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/**
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* Register \c type as new notification type.
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*
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* \note This function is thread safe.
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*
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* \param type New notification type to register.
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* \return registered notification type or NULL on failure.
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*/
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struct spdk_notify_type *spdk_notify_type_register(const char *type);
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/**
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* Return name of the notification type.
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*
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* \param type Notification type we are talking about.
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* \return Name of notification type.
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*/
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const char *spdk_notify_type_get_name(const struct spdk_notify_type *type);
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/**
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* Call cb_fn for all event types.
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*
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* \note Whole function call is under lock so user callback should not sleep.
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* \param cb_fn
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* \param ctx
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*/
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void spdk_notify_foreach_type(spdk_notify_foreach_type_cb cb_fn, void *ctx);
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/**
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* Send given notification.
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*
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* \param type Notification type
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* \param ctx Notification context
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*
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* \return Event index.
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*/
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uint64_t spdk_notify_send(const char *type, const char *ctx);
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/**
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* Call cb_fn with events from given range.
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*
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* \note Whole function call is under lock so user callback should not sleep.
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*
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* \param start_idx First event index
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* \param cb_fn User callback function. Return non-zero to break iteration.
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* \param max Maximum number of invocations of user calback function.
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* \param ctx User context
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* \return Number of user callback invocations
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*/
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uint64_t spdk_notify_foreach_event(uint64_t start_idx, uint64_t max,
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spdk_notify_foreach_event_cb cb_fn, void *ctx);
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#ifdef __cplusplus
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}
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#endif
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#endif /* SPDK_NOTIFY_H */
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