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thread: add methods to get rt priority range

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This commit is contained in:
Wim Taymans 2021-07-05 11:35:27 +02:00
parent 488150fac6
commit dc5ed8f327
5 changed files with 98 additions and 47 deletions
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5
pipewire-jack/src/pipewire-jack.c
View file

@ -56,7 +56,6 @@
#define JACK_DEFAULT_VIDEO_TYPE "32 bit float RGBA video"
#define JACK_SCHED_POLICY SCHED_FIFO
/* use 512KB stack per thread - the default is way too high to be feasible
* with mlockall() on many systems */
#define THREAD_STACK 524288
@ -5437,11 +5436,11 @@ SPA_EXPORT
int jack_client_max_real_time_priority (jack_client_t *client)
{
struct client *c = (struct client *) client;
int max;
int min, max;
spa_return_val_if_fail(c != NULL, -1);
max = sched_get_priority_max(JACK_SCHED_POLICY);
pw_thread_utils_get_rt_range(NULL, &min, &max);
return SPA_MIN(max, c->rt_max) - 1;
}

16
src/modules/module-rt.c
View file

@ -45,6 +45,8 @@
/** \page page_module_rt PipeWire Module: RT
*/
#define DEFAULT_POLICY SCHED_FIFO
#define DEFAULT_NICE_LEVEL -11
#define DEFAULT_RT_PRIO 88
#define DEFAULT_RT_TIME_SOFT 2000000
@ -178,9 +180,20 @@ static int impl_join(void *data, struct pw_thread *thread, void **retval)
return pthread_join(pt, retval);
}
static int impl_get_rt_range(void *data, const struct spa_dict *props,
int *min, int *max)
{
int policy = DEFAULT_POLICY;
if (min)
*min = sched_get_priority_min(policy);
if (max)
*max = sched_get_priority_max(policy);
return 0;
}
static int impl_acquire_rt(void *data, struct pw_thread *thread, int priority)
{
int err, policy = SCHED_FIFO;
int err, policy = DEFAULT_POLICY;
int rtprio = priority;
struct sched_param sp;
pthread_t pt = (pthread_t)thread;
@ -222,6 +235,7 @@ static const struct pw_thread_utils_methods impl_thread_utils = {
PW_VERSION_THREAD_UTILS_METHODS,
.create = impl_create,
.join = impl_join,
.get_rt_range = impl_get_rt_range,
.acquire_rt = impl_acquire_rt,
.drop_rt = impl_drop_rt,
};

12
src/modules/module-rtkit.c
View file

@ -572,6 +572,17 @@ static int impl_join(void *data, struct pw_thread *thread, void **retval)
return pthread_join(pt, retval);
}
static int impl_get_rt_range(void *data, const struct spa_dict *props,
int *min, int *max)
{
struct impl *impl = data;
if (min)
*min = 1;
if (max)
*max = pw_rtkit_get_max_realtime_priority(impl->system_bus);
return 0;
}
static pid_t impl_gettid(struct impl *impl, pthread_t pt)
{
struct thread *thr;
@ -645,6 +656,7 @@ static const struct pw_thread_utils_methods impl_thread_utils = {
PW_VERSION_THREAD_UTILS_METHODS,
.create = impl_create,
.join = impl_join,
.get_rt_range = impl_get_rt_range,
.acquire_rt = impl_acquire_rt,
.drop_rt = impl_drop_rt,
};

54
src/pipewire/thread.c
View file

@ -54,6 +54,16 @@ static int impl_join(void *data, struct pw_thread *thread, void **retval)
return pthread_join(pt, retval);
}
static int impl_get_rt_range(void *data, const struct spa_dict *props,
int *min, int *max)
{
if (min)
*min = sched_get_priority_min(SCHED_OTHER);
if (max)
*max = sched_get_priority_max(SCHED_OTHER);
return 0;
}
static struct {
struct pw_thread_utils utils;
struct pw_thread_utils_methods methods;
@ -63,8 +73,10 @@ static struct {
SPA_CALLBACKS_INIT(&default_impl.methods,
&default_impl) } },
{ PW_VERSION_THREAD_UTILS_METHODS,
.create = impl_create,
.join = impl_join, }
.create = impl_create,
.join = impl_join,
.get_rt_range = impl_get_rt_range
}
};
static struct pw_thread_utils *global_impl = &default_impl.utils;
@ -78,41 +90,7 @@ void pw_thread_utils_set_impl(struct pw_thread_utils *impl)
}
SPA_EXPORT
struct pw_thread *pw_thread_utils_create(const struct spa_dict *props,
void *(*start_routine)(void*), void *arg)
struct pw_thread_utils *pw_thread_utils_get_impl(void)
{
struct pw_thread *res = NULL;
spa_interface_call_res(&global_impl->iface,
struct pw_thread_utils_methods, res, create, 0,
props, start_routine, arg);
return res;
}
SPA_EXPORT
int pw_thread_utils_join(struct pw_thread *thread, void **retval)
{
int res = -ENOTSUP;
spa_interface_call_res(&global_impl->iface,
struct pw_thread_utils_methods, res, join, 0,
thread, retval);
return res;
}
SPA_EXPORT
int pw_thread_utils_acquire_rt(struct pw_thread *thread, int priority)
{
int res = -ENOTSUP;
spa_interface_call_res(&global_impl->iface,
struct pw_thread_utils_methods, res, acquire_rt, 0,
thread, priority);
return res;
}
SPA_EXPORT
int pw_thread_utils_drop_rt(struct pw_thread *thread)
{
int res = -ENOTSUP;
spa_interface_call_res(&global_impl->iface,
struct pw_thread_utils_methods, res, drop_rt, 0, thread);
return res;
return global_impl;
}

58
src/pipewire/thread.h
View file

@ -42,6 +42,9 @@ extern "C" {
#define PW_TYPE_INTERFACE_ThreadUtils PW_TYPE_INFO_INTERFACE_BASE "ThreadUtils"
/** a thread object.
* This can be cast to a platform native thread, like pthread on posix systems
*/
struct pw_thread;
#define PW_VERSION_THREAD_UTILS 0
@ -52,22 +55,67 @@ struct pw_thread_utils_methods {
#define PW_VERSION_THREAD_UTILS_METHODS 0
uint32_t version;
/** create a new thread that runs \a start with \a arg */
struct pw_thread * (*create) (void *data, const struct spa_dict *props,
void *(*start)(void*), void *arg);
/** stop and join a thread */
int (*join)(void *data, struct pw_thread *thread, void **retval);
/** get realtime priority range for threads created with \a props */
int (*get_rt_range) (void *data, const struct spa_dict *props, int *min, int *max);
/** acquire realtime priority */
int (*acquire_rt) (void *data, struct pw_thread *thread, int priority);
/** drop realtime priority */
int (*drop_rt) (void *data, struct pw_thread *thread);
};
void pw_thread_utils_set_impl(struct pw_thread_utils *impl);
struct pw_thread_utils *pw_thread_utils_get_impl(void);
struct pw_thread *pw_thread_utils_create(const struct spa_dict *props,
void *(*start)(void*), void *arg);
int pw_thread_utils_join(struct pw_thread *thread, void **retval);
static inline struct pw_thread *pw_thread_utils_create(const struct spa_dict *props,
void *(*start_routine)(void*), void *arg)
{
struct pw_thread *res = NULL;
spa_interface_call_res(&pw_thread_utils_get_impl()->iface,
struct pw_thread_utils_methods, res, create, 0,
props, start_routine, arg);
return res;
}
int pw_thread_utils_acquire_rt(struct pw_thread *thread, int priority);
int pw_thread_utils_drop_rt(struct pw_thread *thread);
static inline int pw_thread_utils_join(struct pw_thread *thread, void **retval)
{
int res = -ENOTSUP;
spa_interface_call_res(&pw_thread_utils_get_impl()->iface,
struct pw_thread_utils_methods, res, join, 0,
thread, retval);
return res;
}
static inline int pw_thread_utils_get_rt_range(const struct spa_dict *props, int *min, int *max)
{
int res = -ENOTSUP;
spa_interface_call_res(&pw_thread_utils_get_impl()->iface,
struct pw_thread_utils_methods, res, get_rt_range, 0,
props, min, max);
return res;
}
static inline int pw_thread_utils_acquire_rt(struct pw_thread *thread, int priority)
{
int res = -ENOTSUP;
spa_interface_call_res(&pw_thread_utils_get_impl()->iface,
struct pw_thread_utils_methods, res, acquire_rt, 0,
thread, priority);
return res;
}
static inline int pw_thread_utils_drop_rt(struct pw_thread *thread)
{
int res = -ENOTSUP;
spa_interface_call_res(&pw_thread_utils_get_impl()->iface,
struct pw_thread_utils_methods, res, drop_rt, 0, thread);
return res;
}
#ifdef __cplusplus
} /* extern "C" */