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sched/signal: Initialize signal action pool during init phase

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Initialize the signal action pool during the signal initialization
phase to improve performance and reduce footprint.

Signed-off-by: Chengdong Wang <wangchengdong@lixiang.com>
This commit is contained in:
wangchengdong
2025-11-23 16:09:38 +08:00
committed by Xiang Xiao
parent bc561c677a
commit 817e4ee354
3 changed files with 31 additions and 22 deletions
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22
sched/signal/sig_action.c
View File

@@ -62,11 +62,6 @@
static spinlock_t g_sigaction_spin;
#if CONFIG_SIG_PREALLOC_ACTIONS > 0
static sigactq_t g_sigactions[CONFIG_SIG_PREALLOC_ACTIONS];
static bool g_sigactions_used = false;
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
@@ -86,23 +81,6 @@ static void nxsig_alloc_actionblock(void)
irqstate_t flags;
int i;
/* Use pre-allocated instances only once */
#if CONFIG_SIG_PREALLOC_ACTIONS > 0
flags = spin_lock_irqsave(&g_sigaction_spin);
if (!g_sigactions_used)
{
for (i = 0; i < CONFIG_SIG_PREALLOC_ACTIONS; i++)
{
sq_addlast((FAR sq_entry_t *)(g_sigactions + i), &g_sigfreeaction);
}
g_sigactions_used = true;
}
spin_unlock_irqrestore(&g_sigaction_spin, flags);
#endif
/* Allocate a block of signal actions */
sigact = kmm_malloc((sizeof(sigactq_t)) * CONFIG_SIG_ALLOC_ACTIONS);

25
sched/signal/sig_initialize.c
View File

@@ -51,6 +51,12 @@ struct sigpool_s
* Public Data
****************************************************************************/
/* This is a pool of pre-allocated signal action structures buffers */
#if CONFIG_SIG_PREALLOC_ACTIONS > 0
sigactq_t g_sigactions[CONFIG_SIG_PREALLOC_ACTIONS];
#endif
/* The g_sigfreeaction data structure is a list of available signal
* action structures.
*/
@@ -94,6 +100,22 @@ static struct sigpool_s g_sigpool;
* Private Functions
****************************************************************************/
#if CONFIG_SIG_PREALLOC_ACTIONS > 0
static void nxsig_init_signalactionblock(sq_queue_t *siglist,
FAR sigactq_t *sigact,
uint16_t nsigs)
{
int i;
for (i = 0; i < nsigs; i++)
{
sq_addlast((FAR sq_entry_t *)sigact++, siglist);
}
}
#else
# define nxsig_init_signalactionblock(x, y, z)
#endif
/****************************************************************************
* Name: nxsig_init_block
*
@@ -168,6 +190,9 @@ void nxsig_initialize(void)
sq_init(&g_sigpendingsignal);
sq_init(&g_sigpendingirqsignal);
nxsig_init_signalactionblock(&g_sigfreeaction,
g_sigactions,
CONFIG_SIG_PREALLOC_ACTIONS);
sigpool = nxsig_init_block(&g_sigpendingaction, sigpool,
NUM_PENDING_ACTIONS, SIG_ALLOC_FIXED);
sigpool = nxsig_init_block(&g_sigpendingirqaction, sigpool,

6
sched/signal/signal.h
View File

@@ -116,6 +116,12 @@ typedef struct sigq_s sigq_t;
* Public Data
****************************************************************************/
/* The g_sigactions data structure a pool of pre-allocated signal action
* structures buffers structures.
*/
extern sigactq_t g_sigactions[CONFIG_SIG_PREALLOC_ACTIONS];
/* The g_sigfreeaction data structure is a list of available signal action
* structures.
*/