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