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Diffstat (limited to 'libc/stdlib/mrand48_r.c')

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d identifier */ int p_pid; /* PID of Unix process */ int p_priority; /* Thread priority (== 0 if not realtime) */ struct _pthread_fastlock * p_lock; /* Spinlock for synchronized accesses */ int p_signal; /* last signal received */ sigjmp_buf * p_signal_jmp; /* where to siglongjmp on a signal or NULL */ sigjmp_buf * p_cancel_jmp; /* where to siglongjmp on a cancel or NULL */ char p_terminated; /* true if terminated e.g. by pthread_exit */ char p_detached; /* true if detached */ char p_exited; /* true if the assoc. process terminated */ void * p_retval; /* placeholder for return value */ int p_retcode; /* placeholder for return code */ pthread_descr p_joining; /* thread joining on that thread or NULL */ struct _pthread_cleanup_buffer * p_cleanup; /* cleanup functions */ char p_cancelstate; /* cancellation state */ char p_canceltype; /* cancellation type (deferred/async) */ char p_canceled; /* cancellation request pending */ int * p_errnop; /* pointer to used errno variable */ int p_errno; /* error returned by last system call */ int * p_h_errnop; /* pointer to used h_errno variable */ int p_h_errno; /* error returned by last netdb function */ char * p_in_sighandler; /* stack address of sighandler, or NULL */ char p_sigwaiting; /* true if a sigwait() is in progress */ struct pthread_start_args p_start_args; /* arguments for thread creation */ void ** p_specific[PTHREAD_KEY_1STLEVEL_SIZE]; /* thread-specific data */ void * p_libc_specific[_LIBC_TSD_KEY_N]; /* thread-specific data for libc */ int p_userstack; /* nonzero if the user provided the stack */ void *p_guardaddr; /* address of guard area or NULL */ size_t p_guardsize; /* size of guard area */ pthread_descr p_self; /* Pointer to this structure */ int p_nr; /* Index of descriptor in __pthread_handles */ int p_report_events; /* Nonzero if events must be reported. */ td_eventbuf_t p_eventbuf; /* Data for event. */ struct pthread_atomic p_resume_count; /* number of times restart() was called on thread */ char p_woken_by_cancel; /* cancellation performed wakeup */ pthread_extricate_if *p_extricate; /* See above */ pthread_readlock_info *p_readlock_list; /* List of readlock info structs */ pthread_readlock_info *p_readlock_free; /* Free list of structs */ int p_untracked_readlock_count; /* Readlocks not tracked by list */ /* New elements must be added at the end. */ } __attribute__ ((aligned(32))); /* We need to align the structure so that doubles are aligned properly. This is 8 bytes on MIPS and 16 bytes on MIPS64. 32 bytes might give better cache utilization. */ /* The type of thread handles. */ typedef struct pthread_handle_struct * pthread_handle; struct pthread_handle_struct { struct _pthread_fastlock h_lock; /* Fast lock for sychronized access */ pthread_descr h_descr; /* Thread descriptor or NULL if invalid */ char * h_bottom; /* Lowest address in the stack thread */ }; /* The type of messages sent to the thread manager thread */ struct pthread_request { pthread_descr req_thread; /* Thread doing the request */ enum { /* Request kind */ REQ_CREATE, REQ_FREE, REQ_PROCESS_EXIT, REQ_MAIN_THREAD_EXIT, REQ_POST, REQ_DEBUG } req_kind; union { /* Arguments for request */ struct { /* For REQ_CREATE: */ const pthread_attr_t * attr; /* thread attributes */ void * (*fn)(void *); /* start function */ void * arg; /* argument to start function */ sigset_t mask; /* signal mask */ } create; struct { /* For REQ_FREE: */ pthread_t thread_id; /* identifier of thread to free */ } free; struct { /* For REQ_PROCESS_EXIT: */ int code; /* exit status */ } exit; void * post; /* For REQ_POST: the semaphore */ } req_args; }; /* Signals used for suspend/restart and for cancellation notification. */ extern int __pthread_sig_restart; extern int __pthread_sig_cancel; /* Signal used for interfacing with gdb */ extern int __pthread_sig_debug; /* Global array of thread handles, used for validating a thread id and retrieving the corresponding thread descriptor. Also used for mapping the available stack segments. */ extern struct pthread_handle_struct __pthread_handles[PTHREAD_THREADS_MAX]; /* Descriptor of the initial thread */ extern struct _pthread_descr_struct __pthread_initial_thread; /* Descriptor of the manager thread */ extern struct _pthread_descr_struct __pthread_manager_thread; /* Descriptor of the main thread */ extern pthread_descr __pthread_main_thread; /* Limit between the stack of the initial thread (above) and the stacks of other threads (below). Aligned on a STACK_SIZE boundary. Initially 0, meaning that the current thread is (by definition) the initial thread. */ /* For non-MMU systems also remember to stack top of the initial thread. * This is adapted when other stacks are malloc'ed since we don't know * the bounds a-priori. -StS */ extern char *__pthread_initial_thread_bos; #ifndef __UCLIBC_HAS_MMU__ extern char *__pthread_initial_thread_tos; #define NOMMU_INITIAL_THREAD_BOUNDS(tos,bos) if ((tos)>=__pthread_initial_thread_bos && (bos)<=__pthread_initial_thread_tos) __pthread_initial_thread_bos = (tos)+1 #else #define NOMMU_INITIAL_THREAD_BOUNDS(tos,bos) /* empty */ #endif /* __UCLIBC_HAS_MMU__ */ /* Indicate whether at least one thread has a user-defined stack (if 1), or all threads have stacks supplied by LinuxThreads (if 0). */ extern int __pthread_nonstandard_stacks; /* File descriptor for sending requests to the thread manager. Initially -1, meaning that __pthread_initialize_manager must be called. */ extern int __pthread_manager_request; /* Other end of the pipe for sending requests to the thread manager. */ extern int __pthread_manager_reader; /* Limits of the thread manager stack. */ extern char *__pthread_manager_thread_bos; extern char *__pthread_manager_thread_tos; /* Pending request for a process-wide exit */ extern int __pthread_exit_requested, __pthread_exit_code; /* Set to 1 by gdb if we're debugging */ extern volatile int __pthread_threads_debug; /* Globally enabled events. */ extern volatile td_thr_events_t __pthread_threads_events; /* Pointer to descriptor of thread with last event. */ extern volatile pthread_descr __pthread_last_event; /* Return the handle corresponding to a thread id */ static inline pthread_handle thread_handle(pthread_t id) { return &__pthread_handles[id % PTHREAD_THREADS_MAX]; } /* Validate a thread handle. Must have acquired h->h_spinlock before. */ static inline int invalid_handle(pthread_handle h, pthread_t id) { return h->h_descr == NULL || h->h_descr->p_tid != id; } /* Fill in defaults left unspecified by pt-machine.h. */ /* The page size we can get from the system. This should likely not be changed by the machine file but, you never know. */ #ifndef PAGE_SIZE #define PAGE_SIZE (sysconf (_SC_PAGE_SIZE)) #endif /* The max size of the thread stack segments. If the default THREAD_SELF implementation is used, this must be a power of two and a multiple of PAGE_SIZE. */ #ifndef STACK_SIZE #define STACK_SIZE (2 * 1024 * 1024) #endif /* The initial size of the thread stack. Must be a multiple of PAGE_SIZE. */ #ifndef INITIAL_STACK_SIZE #define INITIAL_STACK_SIZE (4 * PAGE_SIZE) #endif /* Size of the thread manager stack. The "- 32" avoids wasting space with some malloc() implementations. */ #ifndef THREAD_MANAGER_STACK_SIZE #define THREAD_MANAGER_STACK_SIZE (2 * PAGE_SIZE - 32) #endif /* The base of the "array" of thread stacks. The array will grow down from here. Defaults to the calculated bottom of the initial application stack. */ #ifndef THREAD_STACK_START_ADDRESS #define THREAD_STACK_START_ADDRESS __pthread_initial_thread_bos #endif /* Get some notion of the current stack. Need not be exactly the top of the stack, just something somewhere in the current frame. */ #ifndef CURRENT_STACK_FRAME #define CURRENT_STACK_FRAME ({ char __csf; &__csf; }) #endif /* Recover thread descriptor for the current thread */ extern pthread_descr __pthread_find_self (void) __attribute__ ((const)); static inline pthread_descr thread_self (void) __attribute__ ((const)); static inline pthread_descr thread_self (void) { #ifdef THREAD_SELF return THREAD_SELF; #else char *sp = CURRENT_STACK_FRAME; #ifdef __UCLIBC_HAS_MMU__ if (sp >= __pthread_initial_thread_bos) return &__pthread_initial_thread; else if (sp >= __pthread_manager_thread_bos && sp < __pthread_manager_thread_tos) return &__pthread_manager_thread; else if (__pthread_nonstandard_stacks) return __pthread_find_self(); else return (pthread_descr)(((unsigned long)sp | (STACK_SIZE-1))+1) - 1; #else /* For non-MMU we need to be more careful about the initial thread stack. * We refine the initial thread stack bounds dynamically as we allocate * the other stack frame such that it doesn't overlap with them. Then * we can be sure to pick the right thread according to the current SP */ /* Since we allow other stack frames to be above or below, we need to * treat this case special. When pthread_initialize() wasn't called yet, * only the initial thread is there. */ if (__pthread_initial_thread_bos == NULL) { return &__pthread_initial_thread; } else if (sp >= __pthread_initial_thread_bos && sp < __pthread_initial_thread_tos) { return &__pthread_initial_thread; } else if (sp >= __pthread_manager_thread_bos && sp < __pthread_manager_thread_tos) { return &__pthread_manager_thread; } else { return __pthread_find_self(); } #endif /* __UCLIBC_HAS_MMU__ */ #endif } /* Max number of times we must spin on a spinlock calling sched_yield(). After MAX_SPIN_COUNT iterations, we put the calling thread to sleep. */ #ifndef MAX_SPIN_COUNT #define MAX_SPIN_COUNT 50 #endif /* Duration of sleep (in nanoseconds) when we can't acquire a spinlock after MAX_SPIN_COUNT iterations of sched_yield(). With the 2.0 and 2.1 kernels, this MUST BE > 2ms. (Otherwise the kernel does busy-waiting for realtime threads, giving other threads no chance to run.) */ #ifndef SPIN_SLEEP_DURATION #define SPIN_SLEEP_DURATION 2000001 #endif /* Debugging */ #ifdef DEBUG #include #define ASSERT assert #define MSG __pthread_message #else #define ASSERT(x) #define MSG(msg,arg...) #endif /* Internal global functions */ void __pthread_destroy_specifics(void); void __pthread_perform_cleanup(void); int __pthread_initialize_manager(void); void __pthread_message(char * fmt, ...); int __pthread_manager(void *reqfd); int __pthread_manager_event(void *reqfd); void __pthread_manager_sighandler(int sig); void __pthread_reset_main_thread(void); void __fresetlockfiles(void); void __pthread_manager_adjust_prio(int thread_prio); void __pthread_set_own_extricate_if(pthread_descr self, pthread_extricate_if *peif); extern int __pthread_attr_setguardsize __P ((pthread_attr_t *__attr, size_t __guardsize)); extern int __pthread_attr_getguardsize __P ((__const pthread_attr_t *__attr, size_t *__guardsize)); extern int __pthread_attr_setstackaddr __P ((pthread_attr_t *__attr, void *__stackaddr)); extern int __pthread_attr_getstackaddr __P ((__const pthread_attr_t *__attr, void **__stackaddr)); extern int __pthread_attr_setstacksize __P ((pthread_attr_t *__attr, size_t __stacksize)); extern int __pthread_attr_getstacksize __P ((__const pthread_attr_t *__attr, size_t *__stacksize)); extern int __pthread_getconcurrency __P ((void)); extern int __pthread_setconcurrency __P ((int __level)); extern int __pthread_mutexattr_gettype __P ((__const pthread_mutexattr_t *__attr, int *__kind)); extern void __pthread_kill_other_threads_np __P ((void)); void __pthread_restart_old(pthread_descr th); void __pthread_suspend_old(pthread_descr self); void __pthread_restart_new(pthread_descr th); void __pthread_suspend_new(pthread_descr self); void __pthread_wait_for_restart_signal(pthread_descr self); void __pthread_init_condvar(int rt_sig_available); /* Global pointers to old or new suspend functions */ extern void (*__pthread_restart)(pthread_descr); extern void (*__pthread_suspend)(pthread_descr); /* Prototypes for the function without cancelation support when the normal version has it. */ extern int __libc_close (int fd); extern int __libc_nanosleep (const struct timespec *requested_time, struct timespec *remaining); extern ssize_t __libc_read (int fd, void *buf, size_t count); extern pid_t __libc_waitpid (pid_t pid, int *stat_loc, int options); extern ssize_t __libc_write (int fd, const void *buf, size_t count); /* Prototypes for some of the new semaphore functions. */ extern int __new_sem_post (sem_t * sem); /* The functions called the signal events. */ extern void __linuxthreads_create_event (void); extern void __linuxthreads_death_event (void); extern void __linuxthreads_reap_event (void); #endif /* internals.h */


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