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other primitive implementations. Additionally ensure that GFP_ATOMIC is use for allocations when in interrupt context. git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@108 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
#ifndef _SPL_CONDVAR_H
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#define _SPL_CONDVAR_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <linux/module.h>
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#include <linux/wait.h>
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#include <sys/mutex.h>
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/* The kcondvar_t struct is protected by mutex taken externally before
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* calling any of the wait/signal funs, and passed into the wait funs.
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*/
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#define CV_MAGIC 0x346545f4
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#define CV_POISON 0x95
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typedef struct {
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int cv_magic;
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char *cv_name;
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int cv_name_size;
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wait_queue_head_t cv_event;
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atomic_t cv_waiters;
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kmutex_t *cv_mutex;
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spinlock_t cv_lock;
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} kcondvar_t;
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typedef enum { CV_DEFAULT=0, CV_DRIVER } kcv_type_t;
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extern void __cv_init(kcondvar_t *cvp, char *name, kcv_type_t type, void *arg);
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extern void __cv_destroy(kcondvar_t *cvp);
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extern void __cv_wait(kcondvar_t *cvp, kmutex_t *mp);
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extern clock_t __cv_timedwait(kcondvar_t *cvp, kmutex_t *mp,
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clock_t expire_time);
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extern void __cv_signal(kcondvar_t *cvp);
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extern void __cv_broadcast(kcondvar_t *cvp);
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#define cv_init(cvp, name, type, arg) \
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({ \
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if ((name) == NULL) \
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__cv_init(cvp, #cvp, type, arg); \
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else \
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__cv_init(cvp, name, type, arg); \
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})
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#define cv_destroy(cvp) __cv_destroy(cvp)
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#define cv_wait(cvp, mp) __cv_wait(cvp, mp)
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#define cv_timedwait(cvp, mp, t) __cv_timedwait(cvp, mp, t)
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#define cv_signal(cvp) __cv_signal(cvp)
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#define cv_broadcast(cvp) __cv_broadcast(cvp)
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#endif /* _SPL_CONDVAR_H */
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