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Diffstat (limited to 'libpthread/linuxthreads/descr.h')
| -rw-r--r-- | libpthread/linuxthreads/descr.h | 313 |
1 files changed, 0 insertions, 313 deletions
diff --git a/libpthread/linuxthreads/descr.h b/libpthread/linuxthreads/descr.h deleted file mode 100644 index fb5fa350e..000000000 --- a/libpthread/linuxthreads/descr.h +++ /dev/null @@ -1,313 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -#ifndef _DESCR_H -#define _DESCR_H 1 - -#include <features.h> -#include <sched.h> -#include <setjmp.h> -#include <signal.h> -#include <stdint.h> -#include <sys/types.h> -#include <tls.h> - -#if 1 -# include <bits/libc-tsd.h> -#else -/* Fast thread-specific data internal to libc. */ -enum __libc_tsd_key_t { _LIBC_TSD_KEY_MALLOC = 0, - _LIBC_TSD_KEY_DL_ERROR, - _LIBC_TSD_KEY_RPC_VARS, - _LIBC_TSD_KEY_LOCALE, - _LIBC_TSD_KEY_CTYPE_B, - _LIBC_TSD_KEY_CTYPE_TOLOWER, - _LIBC_TSD_KEY_CTYPE_TOUPPER, - _LIBC_TSD_KEY_N }; -#endif - -/* The type of thread descriptors */ -typedef struct _pthread_descr_struct *pthread_descr; - - -/* Some more includes. */ -#include <pt-machine.h> -#include "../linuxthreads_db/thread_dbP.h" - - -/* Arguments passed to thread creation routine */ -struct pthread_start_args { - void *(*start_routine)(void *); /* function to run */ - void *arg; /* its argument */ - sigset_t mask; /* initial signal mask for thread */ - int schedpolicy; /* initial scheduling policy (if any) */ - struct sched_param schedparam; /* initial scheduling parameters (if any) */ -}; - - -/* Callback interface for removing the thread from waiting on an - object if it is cancelled while waiting or about to wait. - This hold a pointer to the object, and a pointer to a function - which ``extricates'' the thread from its enqueued state. - The function takes two arguments: pointer to the wait object, - and a pointer to the thread. It returns 1 if an extrication - actually occured, and hence the thread must also be signalled. - It returns 0 if the thread had already been extricated. */ -typedef struct _pthread_extricate_struct { - void *pu_object; - int (*pu_extricate_func)(void *, pthread_descr); -} pthread_extricate_if; - - -/* Atomic counter made possible by compare_and_swap */ -struct pthread_atomic { - long p_count; - int p_spinlock; -}; - - -/* Context info for read write locks. The pthread_rwlock_info structure - is information about a lock that has been read-locked by the thread - in whose list this structure appears. The pthread_rwlock_context - is embedded in the thread context and contains a pointer to the - head of the list of lock info structures, as well as a count of - read locks that are untracked, because no info structure could be - allocated for them. */ -struct _pthread_rwlock_t; -typedef struct _pthread_rwlock_info { - struct _pthread_rwlock_info *pr_next; - struct _pthread_rwlock_t *pr_lock; - int pr_lock_count; -} pthread_readlock_info; - - -/* We keep thread specific data in a special data structure, a two-level - array. The top-level array contains pointers to dynamically allocated - arrays of a certain number of data pointers. So we can implement a - sparse array. Each dynamic second-level array has - PTHREAD_KEY_2NDLEVEL_SIZE - entries. This value shouldn't be too large. */ -#define PTHREAD_KEY_2NDLEVEL_SIZE 32 - -/* We need to address PTHREAD_KEYS_MAX key with PTHREAD_KEY_2NDLEVEL_SIZE - keys in each subarray. */ -#define PTHREAD_KEY_1STLEVEL_SIZE \ - ((PTHREAD_KEYS_MAX + PTHREAD_KEY_2NDLEVEL_SIZE - 1) \ - / PTHREAD_KEY_2NDLEVEL_SIZE) - - -union dtv; - -struct _pthread_descr_struct -{ -#if !defined USE_TLS || !TLS_DTV_AT_TP - /* This overlaps tcbhead_t (see tls.h), as used for TLS without threads. */ - union - { - struct - { - void *tcb; /* Pointer to the TCB. This is not always - the address of this thread descriptor. */ - union dtv *dtvp; - pthread_descr self; /* Pointer to this structure */ - int multiple_threads; -# ifdef NEED_DL_SYSINFO - uintptr_t sysinfo; -# endif - } data; - void *__padding[16]; - } p_header; -# define p_multiple_threads p_header.data.multiple_threads -#elif TLS_MULTIPLE_THREADS_IN_TCB - int p_multiple_threads; -#endif - - pthread_descr p_nextlive, p_prevlive; - /* Double chaining of active threads */ - pthread_descr p_nextwaiting; /* Next element in the queue holding the thr */ - pthread_descr p_nextlock; /* can be on a queue and waiting on a lock */ - pthread_t p_tid; /* Thread 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 */ - 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 */ -#if !(USE_TLS && HAVE___THREAD) - void * p_libc_specific[_LIBC_TSD_KEY_N]; /* thread-specific data for libc */ - 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 */ -#endif - 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 */ - char p_condvar_avail; /* flag if conditional variable became avail */ - char p_sem_avail; /* flag if semaphore became available */ - 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 */ - int p_inheritsched; /* copied from the thread attribute */ -#if HP_TIMING_AVAIL - hp_timing_t p_cpuclock_offset; /* Initial CPU clock for thread. */ -#endif -#ifdef USE_TLS - char *p_stackaddr; /* Stack address. */ -#endif - size_t p_alloca_cutoff; /* Maximum size which should be allocated - using alloca() instead of malloc(). */ - /* New elements must be added at the end. */ -#ifdef __UCLIBC_HAS_XLOCALE__ - __locale_t locale; /* thread-specific locale from uselocale() only! */ -#endif /* __UCLIBC_HAS_XLOCALE__ */ -} __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. */ - - - -/* 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 __ARCH_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 /* __ARCH_HAS_MMU__ */ - -/* Descriptor of the initial thread */ - -extern struct _pthread_descr_struct __pthread_initial_thread; - -/* Limits of the thread manager stack. */ - -extern char *__pthread_manager_thread_bos; -extern char *__pthread_manager_thread_tos; - -/* Descriptor of the manager thread */ - -extern struct _pthread_descr_struct __pthread_manager_thread; -extern pthread_descr __pthread_manager_threadp attribute_hidden; - -/* 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; - -/* 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 -#ifdef __ARCH_HAS_MMU__ -#define STACK_SIZE (2 * 1024 * 1024) -#else -#define STACK_SIZE (4 * __pagesize) -#endif -#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__ ((pure)); - -static inline pthread_descr thread_self (void) __attribute__ ((pure)); -static inline pthread_descr thread_self (void) -{ -#ifdef THREAD_SELF - return THREAD_SELF; -#else - char *sp = CURRENT_STACK_FRAME; -#ifdef __ARCH_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 -#ifdef _STACK_GROWS_DOWN - return (pthread_descr)(((unsigned long)sp | (STACK_SIZE-1))+1) - 1; -#else - return (pthread_descr)((unsigned long)sp &~ (STACK_SIZE-1)); -#endif -#else /* !__ARCH_HAS_MMU__ */ - /* 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 /* __ARCH_HAS_MMU__ */ -#endif -} - -#endif /* descr.h */ |