2018-12-10 01:28:32 +08:00
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/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright (C) 2018 Philippe Gerum <rpm@xenomai.org>
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*/
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2019-03-10 23:25:02 +08:00
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#ifndef _EVL_THREAD_H
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#define _EVL_THREAD_H
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2018-12-10 01:28:32 +08:00
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#include <linux/types.h>
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#include <limits.h>
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2019-06-16 18:11:01 +08:00
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#include <stdbool.h>
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2020-04-17 12:49:34 +08:00
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#include <sched.h>
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2019-03-10 23:25:02 +08:00
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#include <evl/syscall.h>
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2019-06-27 23:42:40 +08:00
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#include <uapi/evl/signal.h>
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2019-03-10 23:25:02 +08:00
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#include <uapi/evl/thread.h>
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#include <uapi/evl/sched.h>
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lib: introduce element visibility attribute
Since core ABI 21, users can decide whether a new element should be
made public or private depending on the value of clone flags added to
the new long form of all element creation calls, i.e. evl_create_*().
All evl_new_*() calls become a shorthand for their respective long
form with reasonable default arguments, including private visibility.
As a shorthand, libevl also interprets a slash character leading the
name argument passed to these services as an implicit request for
creating a public element. In other words, this is the same as passing
EVL_CLONE_PUBLIC in the clone flags.
A public element appears as a cdev in the /dev/evl hierarchy, which
means that it is visible to other processes, which may share it. On
the contrary, a private element is only known from the process
creating it, although it does appear in the /sysfs hierarchy
regardless.
e.g.:
efd = evl_attach_self("/visible-thread");
total 0
crw-rw---- 1 root root 248, 1 Apr 17 11:59 clone
crw-rw---- 1 root root 246, 0 Apr 17 11:59 visible-thread
or,
efd = evl_attach_self("private-thread");
total 0
crw-rw---- 1 root root 248, 1 Apr 17 11:59 clone
Signed-off-by: Philippe Gerum <rpm@xenomai.org>
2020-04-17 18:24:28 +08:00
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#include <uapi/evl/factory.h>
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2018-12-10 01:28:32 +08:00
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#define EVL_STACK_DEFAULT \
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({ \
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int __ret = PTHREAD_STACK_MIN; \
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if (__ret < 65536) \
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__ret = 65536; \
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__ret; \
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})
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lib: introduce element visibility attribute
Since core ABI 21, users can decide whether a new element should be
made public or private depending on the value of clone flags added to
the new long form of all element creation calls, i.e. evl_create_*().
All evl_new_*() calls become a shorthand for their respective long
form with reasonable default arguments, including private visibility.
As a shorthand, libevl also interprets a slash character leading the
name argument passed to these services as an implicit request for
creating a public element. In other words, this is the same as passing
EVL_CLONE_PUBLIC in the clone flags.
A public element appears as a cdev in the /dev/evl hierarchy, which
means that it is visible to other processes, which may share it. On
the contrary, a private element is only known from the process
creating it, although it does appear in the /sysfs hierarchy
regardless.
e.g.:
efd = evl_attach_self("/visible-thread");
total 0
crw-rw---- 1 root root 248, 1 Apr 17 11:59 clone
crw-rw---- 1 root root 246, 0 Apr 17 11:59 visible-thread
or,
efd = evl_attach_self("private-thread");
total 0
crw-rw---- 1 root root 248, 1 Apr 17 11:59 clone
Signed-off-by: Philippe Gerum <rpm@xenomai.org>
2020-04-17 18:24:28 +08:00
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#define evl_attach_self(__fmt, __args...) \
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2020-04-22 01:07:17 +08:00
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evl_attach_thread(EVL_CLONE_PRIVATE, __fmt, ##__args)
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lib: introduce element visibility attribute
Since core ABI 21, users can decide whether a new element should be
made public or private depending on the value of clone flags added to
the new long form of all element creation calls, i.e. evl_create_*().
All evl_new_*() calls become a shorthand for their respective long
form with reasonable default arguments, including private visibility.
As a shorthand, libevl also interprets a slash character leading the
name argument passed to these services as an implicit request for
creating a public element. In other words, this is the same as passing
EVL_CLONE_PUBLIC in the clone flags.
A public element appears as a cdev in the /dev/evl hierarchy, which
means that it is visible to other processes, which may share it. On
the contrary, a private element is only known from the process
creating it, although it does appear in the /sysfs hierarchy
regardless.
e.g.:
efd = evl_attach_self("/visible-thread");
total 0
crw-rw---- 1 root root 248, 1 Apr 17 11:59 clone
crw-rw---- 1 root root 246, 0 Apr 17 11:59 visible-thread
or,
efd = evl_attach_self("private-thread");
total 0
crw-rw---- 1 root root 248, 1 Apr 17 11:59 clone
Signed-off-by: Philippe Gerum <rpm@xenomai.org>
2020-04-17 18:24:28 +08:00
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2018-12-10 01:28:32 +08:00
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#ifdef __cplusplus
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extern "C" {
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#endif
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2020-04-22 01:07:17 +08:00
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int evl_attach_thread(int flags, const char *fmt, ...);
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2018-12-10 01:28:32 +08:00
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2020-04-22 01:07:17 +08:00
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int evl_detach_thread(int flags);
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2020-12-13 19:08:03 +08:00
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int evl_detach_self(void);
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2019-02-08 02:32:17 +08:00
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2018-12-10 01:28:32 +08:00
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int evl_get_self(void);
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2019-02-08 02:32:17 +08:00
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2018-12-10 01:28:32 +08:00
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int evl_switch_oob(void);
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int evl_switch_inband(void);
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2020-12-13 19:29:25 +08:00
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bool evl_is_inband(void);
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2019-02-08 02:32:17 +08:00
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int evl_get_state(int efd, struct evl_thread_state *statebuf);
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2020-04-22 17:19:16 +08:00
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int evl_unblock_thread(int efd);
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int evl_demote_thread(int efd);
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2020-04-23 01:59:43 +08:00
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int evl_set_thread_mode(int efd, int mask,
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int *oldmask);
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int evl_clear_thread_mode(int efd, int mask,
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int *oldmask);
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2020-04-25 01:25:19 +08:00
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int evl_subscribe(int ofd,
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unsigned int backlog_count,
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int flags);
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int evl_unsubscribe(int ofd);
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2018-12-10 01:28:32 +08:00
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#ifdef __cplusplus
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}
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#endif
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2019-03-10 23:25:02 +08:00
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#endif /* _EVL_THREAD_H */
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