spa/include/spa/support/thread.h

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/* Simple Plugin API
 *
 * Copyright © 2021 Wim Taymans
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
 
#ifndef SPA_THREAD_H
#define SPA_THREAD_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <string.h>
#include <errno.h>
 
#include <spa/utils/defs.h>
#include <spa/utils/hook.h>
#include <spa/utils/dict.h>
 
#define SPA_TYPE_INFO_Thread            SPA_TYPE_INFO_POINTER_BASE "Thread"
struct spa_thread;
 
#define SPA_TYPE_INTERFACE_ThreadUtils  SPA_TYPE_INFO_INTERFACE_BASE "ThreadUtils"
#define SPA_VERSION_THREAD_UTILS                0
struct spa_thread_utils { struct spa_interface iface; };
 
struct spa_thread_utils_methods {
#define SPA_VERSION_THREAD_UTILS_METHODS        0
        uint32_t version;
 
        struct spa_thread * (*create) (void *object, const struct spa_dict *props,
                        void *(*start)(void*), void *arg);
        int (*join)(void *object, struct spa_thread *thread, void **retval);
 
        int (*get_rt_range) (void *object, const struct spa_dict *props, int *min, int *max);
        int (*acquire_rt) (void *object, struct spa_thread *thread, int priority);
        int (*drop_rt) (void *object, struct spa_thread *thread);
};
 
static inline struct spa_thread *spa_thread_utils_create(struct spa_thread_utils *o,
                const struct spa_dict *props, void *(*start_routine)(void*), void *arg)
{
        struct spa_thread *res = NULL;
        spa_interface_call_res(&o->iface,
                        struct spa_thread_utils_methods, res, create, 0,
                        props, start_routine, arg);
        return res;
}
 
static inline int spa_thread_utils_join(struct spa_thread_utils *o,
                struct spa_thread *thread, void **retval)
{
        int res = -ENOTSUP;
        spa_interface_call_res(&o->iface,
                        struct spa_thread_utils_methods, res, join, 0,
                        thread, retval);
        return res;
}
 
static inline int spa_thread_utils_get_rt_range(struct spa_thread_utils *o,
                const struct spa_dict *props, int *min, int *max)
{
        int res = -ENOTSUP;
        spa_interface_call_res(&o->iface,
                        struct spa_thread_utils_methods, res, get_rt_range, 0,
                        props, min, max);
        return res;
}
 
static inline int spa_thread_utils_acquire_rt(struct spa_thread_utils *o,
                struct spa_thread *thread, int priority)
{
        int res = -ENOTSUP;
        spa_interface_call_res(&o->iface,
                        struct spa_thread_utils_methods, res, acquire_rt, 0,
                        thread, priority);
        return res;
}
 
static inline int spa_thread_utils_drop_rt(struct spa_thread_utils *o,
                struct spa_thread *thread)
{
        int res = -ENOTSUP;
        spa_interface_call_res(&o->iface,
                        struct spa_thread_utils_methods, res, drop_rt, 0, thread);
        return res;
}
 
#define SPA_KEY_THREAD_NAME             "thread.name"           /* the thread name */
#define SPA_KEY_THREAD_STACK_SIZE       "thread.stack-size"     /* the stack size of the thread */
 
#ifdef __cplusplus
}  /* extern "C" */
#endif
 
#endif /* SPA_THREAD_H */