87a5d1b5d0
Add a way to create and dispatch events without needing to allocate memory. Also add a way to 'spy' on events, thus allowing 'hooks' to be created. Use a linker list for static events, which we can use to replace functions like arch_cpu_init_f(). Allow an EVENT_DEBUG option which makes it easier to see what is going on at runtime, but uses more code space. Dynamic events allow the creation of a spy at runtime. This is not always necessary, but can be enabled with EVENT_DYNAMIC if needed. A 'test' event is the only option for now. Signed-off-by: Simon Glass <sjg@chromium.org>
36 lines
675 B
C
36 lines
675 B
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Internal definitions for events
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*
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* Copyright 2021 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#ifndef __event_internal_h
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#define __event_internal_h
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#include <event.h>
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#include <linux/list.h>
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/**
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* struct event_spy - a spy that watches for an event of a particular type
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*
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* @id: Spy ID
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* @type: Event type to subscribe to
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* @func: Function to call when the event is sent
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* @ctx: Context to pass to the function
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*/
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struct event_spy {
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struct list_head sibling_node;
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const char *id;
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enum event_t type;
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event_handler_t func;
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void *ctx;
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};
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struct event_state {
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struct list_head spy_head;
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};
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#endif
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