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kernel: timer: update _timeout API for const correctness

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API that takes _timeout structures but doesn't change data in them is
updated to const-qualify the underlying object, allowing information
to be retrieved from contexts where the containing object is
immutable.

Signed-off-by: Peter A. Bigot <pab@pabigot.com>
This commit is contained in:
Peter A. Bigot 2020-09-18 16:24:57 -05:00 • committed by Carles Cufí
commit 16a4081520
3 changed files with 7 additions and 7 deletions
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4
include/kernel.h
View file

@ -1058,8 +1058,8 @@ __syscall void k_thread_abort(k_tid_t thread);
*/
__syscall void k_thread_start(k_tid_t thread);
extern k_ticks_t z_timeout_expires(struct _timeout *timeout);
extern k_ticks_t z_timeout_remaining(struct _timeout *timeout);
extern k_ticks_t z_timeout_expires(const struct _timeout *timeout);
extern k_ticks_t z_timeout_remaining(const struct _timeout *timeout);
#ifdef CONFIG_SYS_CLOCK_EXISTS

4
include/timeout_q.h
View file

@ -32,7 +32,7 @@ void z_add_timeout(struct _timeout *to, _timeout_func_t fn,
int z_abort_timeout(struct _timeout *to);
static inline bool z_is_inactive_timeout(struct _timeout *t)
static inline bool z_is_inactive_timeout(const struct _timeout *t)
{
return !sys_dnode_is_linked(&t->node);
}
@ -58,7 +58,7 @@ int32_t z_get_next_timeout_expiry(void);
void z_set_timeout_expiry(int32_t ticks, bool idle);
k_ticks_t z_timeout_remaining(struct _timeout *timeout);
k_ticks_t z_timeout_remaining(const struct _timeout *timeout);
#else

6
kernel/timeout.c
View file

@ -143,7 +143,7 @@ int z_abort_timeout(struct _timeout *to)
}
/* must be locked */
static k_ticks_t timeout_rem(struct _timeout *timeout)
static k_ticks_t timeout_rem(const struct _timeout *timeout)
{
k_ticks_t ticks = 0;
@ -161,7 +161,7 @@ static k_ticks_t timeout_rem(struct _timeout *timeout)
return ticks - elapsed();
}
k_ticks_t z_timeout_remaining(struct _timeout *timeout)
k_ticks_t z_timeout_remaining(const struct _timeout *timeout)
{
k_ticks_t ticks = 0;
@ -172,7 +172,7 @@ k_ticks_t z_timeout_remaining(struct _timeout *timeout)
return ticks;
}
k_ticks_t z_timeout_expires(struct _timeout *timeout)
k_ticks_t z_timeout_expires(const struct _timeout *timeout)
{
k_ticks_t ticks = 0;