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Add function UMTX_OP_WAIT_UINT, the function causes thread to wait for

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an integer to be changed.
This commit is contained in:
David Xu 2007-11-21 04:21:02 +00:00
parent 8611774e5e
commit 110de0cf17
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=173800
2 changed files with 26 additions and 3 deletions
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26
sys/kern/kern_umtx.c
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@ -2385,6 +2385,26 @@ __umtx_op_wait(struct thread *td, struct _umtx_op_args *uap)
return do_wait(td, uap->obj, uap->val, ts, 0);
}
static int
__umtx_op_wait_uint(struct thread *td, struct _umtx_op_args *uap)
{
struct timespec *ts, timeout;
int error;
if (uap->uaddr2 == NULL)
ts = NULL;
else {
error = copyin(uap->uaddr2, &timeout, sizeof(timeout));
if (error != 0)
return (error);
if (timeout.tv_nsec >= 1000000000 ||
timeout.tv_nsec < 0)
return (EINVAL);
ts = &timeout;
}
return do_wait(td, uap->obj, uap->val, ts, 1);
}
static int
__umtx_op_wake(struct thread *td, struct _umtx_op_args *uap)
{
@ -2480,7 +2500,8 @@ static _umtx_op_func op_table[] = {
__umtx_op_set_ceiling, /* UMTX_OP_SET_CEILING */
__umtx_op_cv_wait, /* UMTX_OP_CV_WAIT*/
__umtx_op_cv_signal, /* UMTX_OP_CV_SIGNAL */
__umtx_op_cv_broadcast /* UMTX_OP_CV_BROADCAST */
__umtx_op_cv_broadcast, /* UMTX_OP_CV_BROADCAST */
__umtx_op_wait_uint /* UMTX_OP_WAIT_UINT */
};
int
@ -2626,7 +2647,8 @@ static _umtx_op_func op_table_compat32[] = {
__umtx_op_set_ceiling, /* UMTX_OP_SET_CEILING */
__umtx_op_cv_wait_compat32, /* UMTX_OP_CV_WAIT*/
__umtx_op_cv_signal, /* UMTX_OP_CV_SIGNAL */
__umtx_op_cv_broadcast /* UMTX_OP_CV_BROADCAST */
__umtx_op_cv_broadcast, /* UMTX_OP_CV_BROADCAST */
__umtx_op_wait_compat32 /* UMTX_OP_WAIT_UINT */
};
int

3
sys/sys/umtx.h
View File

@ -78,7 +78,8 @@ struct ucond {
#define UMTX_OP_CV_WAIT 8
#define UMTX_OP_CV_SIGNAL 9
#define UMTX_OP_CV_BROADCAST 10
#define UMTX_OP_MAX 11
#define UMTX_OP_WAIT_UINT 11
#define UMTX_OP_MAX 12
/* flags for UMTX_OP_CV_WAIT */
#define UMTX_CHECK_UNPARKING 0x01