125 lines
4.2 KiB
C++
125 lines
4.2 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _PTHREAD_INTERNAL_H_
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#define _PTHREAD_INTERNAL_H_
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#include <pthread.h>
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/* Has the thread been detached by a pthread_join or pthread_detach call? */
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#define PTHREAD_ATTR_FLAG_DETACHED 0x00000001
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/* Was the thread's stack allocated by the user rather than by us? */
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#define PTHREAD_ATTR_FLAG_USER_ALLOCATED_STACK 0x00000002
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/* Has the thread been joined by another thread? */
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#define PTHREAD_ATTR_FLAG_JOINED 0x00000004
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/* Is this the main thread? */
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#define PTHREAD_ATTR_FLAG_MAIN_THREAD 0x80000000
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struct pthread_internal_t {
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struct pthread_internal_t* next;
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struct pthread_internal_t* prev;
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pid_t tid;
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private:
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pid_t cached_pid_;
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public:
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pid_t invalidate_cached_pid() {
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pid_t old_value;
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get_cached_pid(&old_value);
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set_cached_pid(0);
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return old_value;
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}
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void set_cached_pid(pid_t value) {
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cached_pid_ = value;
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}
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bool get_cached_pid(pid_t* cached_pid) {
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*cached_pid = cached_pid_;
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return (*cached_pid != 0);
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}
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bool user_allocated_stack() {
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return (attr.flags & PTHREAD_ATTR_FLAG_USER_ALLOCATED_STACK) != 0;
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}
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void** tls;
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pthread_attr_t attr;
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__pthread_cleanup_t* cleanup_stack;
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void* (*start_routine)(void*);
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void* start_routine_arg;
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void* return_value;
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void* alternate_signal_stack;
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pthread_mutex_t startup_handshake_mutex;
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/*
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* The dynamic linker implements dlerror(3), which makes it hard for us to implement this
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* per-thread buffer by simply using malloc(3) and free(3).
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*/
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#define __BIONIC_DLERROR_BUFFER_SIZE 512
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char dlerror_buffer[__BIONIC_DLERROR_BUFFER_SIZE];
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};
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__LIBC_HIDDEN__ int __init_thread(pthread_internal_t* thread, bool add_to_thread_list);
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__LIBC_HIDDEN__ void __init_tls(pthread_internal_t* thread);
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__LIBC_HIDDEN__ void __init_alternate_signal_stack(pthread_internal_t*);
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__LIBC_HIDDEN__ void _pthread_internal_add(pthread_internal_t* thread);
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__LIBC_HIDDEN__ pthread_internal_t* __get_thread(void);
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__LIBC_HIDDEN__ void pthread_key_clean_all(void);
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__LIBC_HIDDEN__ void _pthread_internal_remove_locked(pthread_internal_t* thread);
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/*
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* Traditionally we gave threads a 1MiB stack. When we started
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* allocating per-thread alternate signal stacks to ease debugging of
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* stack overflows, we subtracted the same amount we were using there
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* from the default thread stack size. This should keep memory usage
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* roughly constant.
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*/
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#define PTHREAD_STACK_SIZE_DEFAULT ((1 * 1024 * 1024) - SIGSTKSZ)
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__LIBC_HIDDEN__ extern pthread_internal_t* g_thread_list;
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__LIBC_HIDDEN__ extern pthread_mutex_t g_thread_list_lock;
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__LIBC_HIDDEN__ int __timespec_from_absolute(timespec*, const timespec*, clockid_t);
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/* Needed by fork. */
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__LIBC_HIDDEN__ extern void __bionic_atfork_run_prepare();
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__LIBC_HIDDEN__ extern void __bionic_atfork_run_child();
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__LIBC_HIDDEN__ extern void __bionic_atfork_run_parent();
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#endif /* _PTHREAD_INTERNAL_H_ */
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