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85 lines
3.4 KiB
85 lines
3.4 KiB
/******************************************************************************
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*
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* Copyright 2014 Google, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#pragma once
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#include <stdbool.h>
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#include <stdlib.h>
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#define THREAD_NAME_MAX 16
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typedef struct reactor_t reactor_t;
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typedef struct thread_t thread_t;
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typedef void (*thread_fn)(void* context);
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// Creates and starts a new thread with the given name. Only THREAD_NAME_MAX
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// bytes from |name| will be assigned to the newly-created thread. Returns a
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// thread object if the thread was successfully started, NULL otherwise. The
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// returned thread object must be freed with |thread_free|. |name| may not
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// be NULL.
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thread_t* thread_new(const char* name);
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// Similar to |thread_new| but creates with a given queue |size|.
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thread_t* thread_new_sized(const char* name, size_t size);
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// Frees the given |thread|. If the thread is still running, it is stopped
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// and the calling thread will block until |thread| terminates. |thread|
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// may be NULL.
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void thread_free(thread_t* thread);
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// Waits for |thread_stop|. Upon returning, the only other operations a caller
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// may perform on |thread| are |thread_free| and |thread_join|. |thread_join|
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// is idempotent and may be called from any thread. |thread| may not be NULL.
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void thread_join(thread_t* thread);
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// Call |func| with the argument |context| on |thread|. This function typically
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// does not block unless there are an excessive number of functions posted to
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// |thread| that have not been dispatched yet. Neither |thread| nor |func| may
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// be NULL. |context| may be NULL.
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// Return true on success, otherwise false.
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bool thread_post(thread_t* thread, thread_fn func, void* context);
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// Requests |thread| to stop. Only |thread_free| and |thread_name| may be called
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// after calling |thread_stop|. This function is guaranteed to not block.
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// |thread| may not be NULL.
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void thread_stop(thread_t* thread);
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// Attempts to sets the |priority| of a given |thread|.
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// The |thread| has to be running for this call to succeed.
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// Returns true on success.
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bool thread_set_priority(thread_t* thread, int priority);
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// Attempts to set |thread| to the real-time SCHED_FIFO |priority|.
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// The |thread| has to be running for this call to succeed.
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// Priority values are valid in the range sched_get_priority_max(SCHED_FIFO)
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// to sched_get_priority_min(SCHED_FIFO). Larger values are higher priority.
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// Returns true on success.
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bool thread_set_rt_priority(thread_t* thread, int priority);
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// Returns true if the current thread is the same as the one represented by
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// |thread|.
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// |thread| may not be NULL.
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bool thread_is_self(const thread_t* thread);
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// Returns the reactor for the given |thread|. |thread| may not be NULL.
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reactor_t* thread_get_reactor(const thread_t* thread);
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// Returns the name of the given |thread|. |thread| may not be NULL.
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const char* thread_name(const thread_t* thread);
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