| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * kernel-posix-timers.h - kernel-dependent definitions for POSIX timers. |
| 3 | */ |
| 4 | |
| 5 | #include <features.h> |
| 6 | #include <setjmp.h> |
| 7 | #include <signal.h> |
| 8 | #include <sys/types.h> |
| 9 | #ifdef __UCLIBC_HAS_THREADS__ |
| 10 | #include <pthread.h> |
| 11 | #endif |
| 12 | |
| 13 | #ifdef __UCLIBC_HAS_THREADS_NATIVE__ |
| 14 | /* Nonzero if the system calls are not available. */ |
| 15 | extern int __no_posix_timers attribute_hidden; |
| 16 | |
| 17 | /* Callback to start helper thread. */ |
| 18 | extern void __start_helper_thread (void) attribute_hidden; |
| 19 | |
| 20 | /* Control variable for helper thread creation. */ |
| 21 | extern pthread_once_t __helper_once attribute_hidden; |
| 22 | |
| 23 | /* TID of the helper thread. */ |
| 24 | extern pid_t __helper_tid attribute_hidden; |
| 25 | |
| 26 | /* List of active SIGEV_THREAD timers. */ |
| 27 | extern struct timer *__active_timer_sigev_thread attribute_hidden; |
| 28 | /* Lock for the __active_timer_sigev_thread. */ |
| 29 | extern pthread_mutex_t __active_timer_sigev_thread_lock attribute_hidden; |
| 30 | #endif |
| 31 | |
| 32 | /* Type of timers in the kernel */ |
| 33 | typedef int kernel_timer_t; |
| 34 | |
| 35 | /* Internal representation of timer */ |
| 36 | struct timer { |
| 37 | /* Notification mechanism */ |
| 38 | int sigev_notify; |
| 39 | |
| 40 | /* Timer ID returned by the kernel */ |
| 41 | kernel_timer_t ktimerid; |
| 42 | |
| 43 | /* |
| 44 | * All new elements must be added after ktimerid. And if the thrfunc |
| 45 | * element is not the third element anymore the memory allocation in |
| 46 | * timer_create needs to be changed. |
| 47 | */ |
| 48 | |
| 49 | /* Parameters for the thread to be started for SIGEV_THREAD */ |
| 50 | void (*thrfunc) (sigval_t); |
| 51 | sigval_t sival; |
| 52 | #ifdef __UCLIBC_HAS_THREADS__ |
| 53 | pthread_attr_t attr; |
| 54 | #endif |
| 55 | |
| 56 | /* Next element in list of active SIGEV_THREAD timers. */ |
| 57 | struct timer *next; |
| 58 | }; |