setitimer

Arme ou désarme l'un des timers d'intervalle par processus.

Prototype

int setitimer(u_int which, struct itimerval *itv, struct itimerval *oitv);

Retour: int

Arguments

Name	Type	Dir
which	u_int	-
itv	struct itimerval	-
oitv	struct itimerval	-

Historique des versions

XNU tag	macOS	#
xnu-1456.1.26	macOS 10.6 Snow Leopard	83
xnu-1699.24.8	macOS 10.7 Lion	83
xnu-2050.18.24	macOS 10.8 Mountain Lion	83
xnu-2422.115.4	macOS 10.9 Mavericks	83
xnu-2782.40.9	macOS 10.10 Yosemite	83
xnu-3247.1.106	macOS 10.11 El Capitan	83
xnu-3789.1.32	macOS 10.12 Sierra	83
xnu-4570.1.46	macOS 10.13 High Sierra	83
xnu-4903.221.2	macOS 10.14 Mojave	83
xnu-6153.11.26	macOS 10.15 Catalina	83
xnu-7195.50.7.100.1	macOS 11.0 Big Sur	83
xnu-8019.41.5	macOS 12.0 Monterey	83
xnu-8792.41.9	macOS 13.0 Ventura	83
xnu-10002.1.13	macOS 14.0 Sonoma	83
xnu-11215.1.10	macOS 15.0 Sequoia	83
xnu-11417.101.15	macOS 15.4 Sequoia	83
xnu-12377.1.9	macOS 26.0 Tahoe	83
xnu-10002.41.9	—	83
xnu-10002.61.3	—	83
xnu-10002.81.5	—	83
xnu-10063.101.15	—	83
xnu-10063.121.3	—	83
xnu-10063.141.1	—	83
xnu-11215.41.3	—	83
xnu-11215.61.5	—	83
xnu-11215.81.4	—	83
xnu-11417.121.6	—	83
xnu-11417.140.69	—	83
xnu-12377.101.15	—	83
xnu-12377.41.6	—	83
xnu-12377.61.12	—	83
xnu-12377.81.4	—	83
xnu-1486.2.11	—	83
xnu-1504.15.3	—	83
xnu-1504.3.12	—	83
xnu-1504.7.4	—	83
xnu-1504.9.17	—	83
xnu-1504.9.26	—	83
xnu-1504.9.37	—	83
xnu-1699.22.73	—	83
xnu-1699.22.81	—	83
xnu-1699.24.23	—	83
xnu-1699.26.8	—	83
xnu-1699.32.7	—	83
xnu-2050.22.13	—	83
xnu-2050.24.15	—	83
xnu-2050.48.11	—	83
xnu-2050.7.9	—	83
xnu-2050.9.2	—	83
xnu-2422.1.72	—	83
xnu-2422.100.13	—	83
xnu-2422.110.17	—	83
xnu-2422.90.20	—	83
xnu-2782.1.97	—	83
xnu-2782.10.72	—	83
xnu-2782.20.48	—	83
xnu-2782.30.5	—	83
xnu-3247.10.11	—	83
xnu-3248.20.55	—	83
xnu-3248.30.4	—	83
xnu-3248.40.184	—	83
xnu-3248.50.21	—	83
xnu-3248.60.10	—	83
xnu-3789.21.4	—	83
xnu-3789.31.2	—	83
xnu-3789.41.3	—	83
xnu-3789.51.2	—	83
xnu-3789.60.24	—	83
xnu-3789.70.16	—	83
xnu-4570.20.62	—	83
xnu-4570.31.3	—	83
xnu-4570.41.2	—	83
xnu-4570.51.1	—	83
xnu-4570.61.1	—	83
xnu-4570.71.2	—	83
xnu-4903.231.4	—	83
xnu-4903.241.1	—	83
xnu-4903.270.47	—	83
xnu-6153.101.6	—	83
xnu-6153.121.1	—	83
xnu-6153.141.1	—	83
xnu-6153.41.3	—	83
xnu-6153.61.1	—	83
xnu-6153.81.5	—	83
xnu-7195.101.1	—	83
xnu-7195.121.3	—	83
xnu-7195.141.2	—	83
xnu-7195.60.75	—	83
xnu-7195.81.3	—	83
xnu-8019.61.5	—	83
xnu-8019.80.24	—	83
xnu-8020.101.4	—	83
xnu-8020.121.3	—	83
xnu-8020.140.41	—	83
xnu-8792.61.2	—	83
xnu-8792.81.2	—	83
xnu-8796.101.5	—	83
xnu-8796.121.2	—	83
xnu-8796.141.3	—	83

Exemples

Fire SIGALRM every 500ms

#include <sys/time.h>

struct itimerval it = {
    .it_interval = { .tv_sec = 0, .tv_usec = 500000 },
    .it_value    = { .tv_sec = 0, .tv_usec = 500000 },
};
setitimer(ITIMER_REAL, &it, NULL);

Notes

it_value à zéro désarme le timer ; it_interval non nul demande un déclenchement périodique. La livraison du signal est best-effort et peut être coalescée si le processus n'exécute pas les handlers assez vite. Attention : un seul timer par type par processus, donc une bibliothèque qui en pose un en silence entrera en conflit avec l'application.

API associées

getitimersigactionsigsuspendgettimeofdaykill