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eee51b0ae5
Trimming down sched.h dependencies: timerqueue_types can include just rbtree_types.h instead of pulling in rbtree.h. Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _linux_POSIX_TIMERS_TYPES_H
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#define _linux_POSIX_TIMERS_TYPES_H
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#include <linux/mutex_types.h>
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#include <linux/timerqueue_types.h>
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#include <linux/types.h>
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/*
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* Bit fields within a clockid:
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*
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* The most significant 29 bits hold either a pid or a file descriptor.
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*
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* Bit 2 indicates whether a cpu clock refers to a thread or a process.
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*
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* Bits 1 and 0 give the type: PROF=0, VIRT=1, SCHED=2, or FD=3.
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*
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* A clockid is invalid if bits 2, 1, and 0 are all set.
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*/
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#define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3))
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#define CPUCLOCK_PERTHREAD(clock) \
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(((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)
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#define CPUCLOCK_PERTHREAD_MASK 4
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#define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK)
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#define CPUCLOCK_CLOCK_MASK 3
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#define CPUCLOCK_PROF 0
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#define CPUCLOCK_VIRT 1
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#define CPUCLOCK_SCHED 2
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#define CPUCLOCK_MAX 3
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#define CLOCKFD CPUCLOCK_MAX
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#define CLOCKFD_MASK (CPUCLOCK_PERTHREAD_MASK|CPUCLOCK_CLOCK_MASK)
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#ifdef CONFIG_POSIX_TIMERS
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/**
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* posix_cputimer_base - Container per posix CPU clock
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* @nextevt: Earliest-expiration cache
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* @tqhead: timerqueue head for cpu_timers
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*/
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struct posix_cputimer_base {
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u64 nextevt;
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struct timerqueue_head tqhead;
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};
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/**
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* posix_cputimers - Container for posix CPU timer related data
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* @bases: Base container for posix CPU clocks
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* @timers_active: Timers are queued.
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* @expiry_active: Timer expiry is active. Used for
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* process wide timers to avoid multiple
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* task trying to handle expiry concurrently
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*
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* Used in task_struct and signal_struct
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*/
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struct posix_cputimers {
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struct posix_cputimer_base bases[CPUCLOCK_MAX];
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unsigned int timers_active;
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unsigned int expiry_active;
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};
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/**
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* posix_cputimers_work - Container for task work based posix CPU timer expiry
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* @work: The task work to be scheduled
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* @mutex: Mutex held around expiry in context of this task work
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* @scheduled: @work has been scheduled already, no further processing
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*/
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struct posix_cputimers_work {
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struct callback_head work;
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struct mutex mutex;
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unsigned int scheduled;
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};
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#else /* CONFIG_POSIX_TIMERS */
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struct posix_cputimers { };
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#endif /* CONFIG_POSIX_TIMERS */
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#endif /* _linux_POSIX_TIMERS_TYPES_H */
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