393 lines
8.5 KiB
C++
393 lines
8.5 KiB
C++
/* thread.h: Locking and threading module definitions
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Copyright 1998, 1999, 2000 Cygnus Solutions.
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Copyright 2001 Red Hat, Inc.
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Written by Marco Fuykschot <marco@ddi.nl>
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Major update 2001 Robert Collins <rbtcollins@hotmail.com>
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _CYGNUS_THREADS_
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#define _CYGNUS_THREADS_
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#define LOCK_FD_LIST 1
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#define LOCK_MEMORY_LIST 2
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#define LOCK_MMAP_LIST 3
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#define LOCK_DLL_LIST 4
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#define WRITE_LOCK 1
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#define READ_LOCK 2
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extern "C"
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{
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#if defined (_CYG_THREAD_FAILSAFE) && defined (_MT_SAFE)
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void AssertResourceOwner (int, int);
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#else
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#define AssertResourceOwner(i,ii)
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#endif
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}
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#ifndef _MT_SAFE
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#define SetResourceLock(i,n,c)
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#define ReleaseResourceLock(i,n,c)
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#else
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//#include <pthread.h>
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/* FIXME: these are defined in pthread.h, but pthread.h defines symbols it shouldn't -
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* all the types.
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*/
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#define PTHREAD_PROCESS_PRIVATE 0
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#define PTHREAD_PROCESS_SHARED 1
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#define PTHREAD_DESTRUCTOR_ITERATIONS 1
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/* Tls has 64 items for pre win2000 - and we don't want to use them all :]
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* Before committing discuss this with the list
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*/
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#define PTHREAD_KEYS_MAX 32
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#define PTHREAD_CREATE_DETACHED 1
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/* the default : joinable */
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#define PTHREAD_CREATE_JOINABLE 0
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#include <signal.h>
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#include <pwd.h>
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#include <grp.h>
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#define _NOMNTENT_FUNCS
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#include <mntent.h>
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extern "C"
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{
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struct _winsup_t
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{
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/*
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Needed for the group functions
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*/
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struct group _grp;
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char *_namearray[2];
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int _grp_pos;
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/* console.cc */
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unsigned _rarg;
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/* dlfcn.cc */
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int _dl_error;
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char _dl_buffer[256];
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/* passwd.cc */
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struct passwd _res;
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char _pass[_PASSWORD_LEN];
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int _pw_pos;
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/* path.cc */
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struct mntent mntbuf;
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int _iteration;
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DWORD available_drives;
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/* strerror */
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char _strerror_buf[20];
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/* sysloc.cc */
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char *_process_ident;
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int _process_logopt;
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int _process_facility;
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int _process_logmask;
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/* times.cc */
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char timezone_buf[20];
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struct tm _localtime_buf;
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/* uinfo.cc */
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char _username[MAX_USER_NAME];
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};
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struct __reent_t
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{
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struct _reent *_clib;
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struct _winsup_t *_winsup;
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};
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_reent *_reent_clib ();
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_winsup_t *_reent_winsup ();
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void SetResourceLock (int, int, const char *) __attribute__ ((regparm (3)));
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void ReleaseResourceLock (int, int, const char *)
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__attribute__ ((regparm (3)));
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#ifdef _CYG_THREAD_FAILSAFE
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void AssertResourceOwner (int, int);
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#else
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#define AssertResourceOwner(i,ii)
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#endif
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}
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class per_process;
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class pinfo;
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class ResourceLocks
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{
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public:
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ResourceLocks () {}
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LPCRITICAL_SECTION Lock (int);
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void Init ();
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void Delete ();
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#ifdef _CYG_THREAD_FAILSAFE
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DWORD owner;
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DWORD count;
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#endif
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private:
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CRITICAL_SECTION lock;
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bool inited;
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};
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#define PTHREAD_MAGIC 0xdf0df045
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#define PTHREAD_MUTEX_MAGIC PTHREAD_MAGIC+1
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#define PTHREAD_KEY_MAGIC PTHREAD_MAGIC+2
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#define PTHREAD_ATTR_MAGIC PTHREAD_MAGIC+3
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#define PTHREAD_MUTEXATTR_MAGIC PTHREAD_MAGIC+4
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#define PTHREAD_COND_MAGIC PTHREAD_MAGIC+5
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#define PTHREAD_CONDATTR_MAGIC PTHREAD_MAGIC+6
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#define SEM_MAGIC PTHREAD_MAGIC+7
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class verifyable_object
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{
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public:
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long magic;
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verifyable_object (long);
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~verifyable_object ();
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};
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int verifyable_object_isvalid (verifyable_object *, long);
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class pthread_attr:public verifyable_object
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{
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public:
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int joinable;
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size_t stacksize;
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pthread_attr ();
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~pthread_attr ();
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};
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class pthread:public verifyable_object
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{
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public:
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HANDLE win32_obj_id;
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class pthread_attr attr;
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void *(*function) (void *);
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void *arg;
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void *return_ptr;
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bool suspended;
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int joinable;
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DWORD GetThreadId ()
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{
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return thread_id;
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}
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void setThreadIdtoCurrent ()
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{
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thread_id = GetCurrentThreadId ();
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}
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/* signal handling */
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struct sigaction *sigs;
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sigset_t *sigmask;
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LONG *sigtodo;
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void create (void *(*)(void *), pthread_attr *, void *);
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pthread ();
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~pthread ();
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private:
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DWORD thread_id;
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};
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class pthread_mutexattr:public verifyable_object
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{
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public:
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pthread_mutexattr ();
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~pthread_mutexattr ();
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};
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class pthread_mutex:public verifyable_object
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{
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public:
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HANDLE win32_obj_id;
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LONG condwaits;
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int Lock ();
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int TryLock ();
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int UnLock ();
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pthread_mutex (pthread_mutexattr *);
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~pthread_mutex ();
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};
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class pthread_key:public verifyable_object
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{
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public:
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DWORD dwTlsIndex;
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int set (const void *);
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void *get ();
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pthread_key ();
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~pthread_key ();
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};
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class pthread_condattr:public verifyable_object
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{
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public:
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int shared;
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pthread_condattr ();
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~pthread_condattr ();
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};
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class pthread_cond:public verifyable_object
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{
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public:
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int shared;
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LONG waiting;
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pthread_mutex *mutex;
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HANDLE win32_obj_id;
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int TimedWait (DWORD dwMilliseconds);
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void BroadCast ();
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void Signal ();
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pthread_cond (pthread_condattr *);
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~pthread_cond ();
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};
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/* shouldn't be here */
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class semaphore:public verifyable_object
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{
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public:
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HANDLE win32_obj_id;
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int shared;
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void Wait ();
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void Post ();
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int TryWait ();
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semaphore (int, unsigned int);
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~semaphore ();
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};
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typedef class pthread *pthread_t;
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typedef class pthread_mutex *pthread_mutex_t;
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/* sem routines belong in semaphore.cc */
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typedef class semaphore *sem_t;
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typedef class pthread_key *pthread_key_t;
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typedef class pthread_attr *pthread_attr_t;
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typedef class pthread_mutexattr *pthread_mutexattr_t;
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typedef class pthread_condattr *pthread_condattr_t;
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typedef class pthread_cond *pthread_cond_t;
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class MTinterface
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{
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public:
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// General
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DWORD reent_index;
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DWORD thread_self_dwTlsIndex;
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/* we may get 0 for the Tls index.. grrr */
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int indexallocated;
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// Used for main thread data, and sigproc thread
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struct __reent_t reents;
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struct _winsup_t winsup_reent;
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pthread mainthread;
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void Init (int);
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MTinterface ():reent_index (0), indexallocated (0)
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{}
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};
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extern "C"
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{
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void *thread_init_wrapper (void *);
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/* ThreadCreation */
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int __pthread_create (pthread_t * thread, const pthread_attr_t * attr,
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void *(*start_routine) (void *), void *arg);
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int __pthread_attr_init (pthread_attr_t * attr);
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int __pthread_attr_destroy (pthread_attr_t * attr);
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int __pthread_attr_setdetachstate (pthread_attr_t *, int);
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int __pthread_attr_getdetachstate (const pthread_attr_t *, int *);
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int __pthread_attr_setstacksize (pthread_attr_t * attr, size_t size);
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int __pthread_attr_getstacksize (pthread_attr_t * attr, size_t * size);
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/*
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__pthread_attr_setstackaddr(...);
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__pthread_attr_getstackaddr(...);
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*/
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/* Thread Exit */
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void __pthread_exit (void *value_ptr);
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int __pthread_join (pthread_t * thread, void **return_val);
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int __pthread_detach (pthread_t * thread);
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/* Thread suspend */
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int __pthread_suspend (pthread_t * thread);
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int __pthread_continue (pthread_t * thread);
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unsigned long __pthread_getsequence_np (pthread_t * thread);
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/* Thread SpecificData */
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int __pthread_key_create (pthread_key_t * key, void (*destructor) (void *));
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int __pthread_key_delete (pthread_key_t * key);
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int __pthread_setspecific (pthread_key_t key, const void *value);
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void *__pthread_getspecific (pthread_key_t key);
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/* Thead synchroniation */
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int __pthread_cond_destroy (pthread_cond_t * cond);
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int __pthread_cond_init (pthread_cond_t * cond,
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const pthread_condattr_t * attr);
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int __pthread_cond_signal (pthread_cond_t * cond);
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int __pthread_cond_broadcast (pthread_cond_t * cond);
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int __pthread_cond_timedwait (pthread_cond_t * cond,
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pthread_mutex_t * mutex,
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const struct timespec *abstime);
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int __pthread_cond_wait (pthread_cond_t * cond, pthread_mutex_t * mutex);
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int __pthread_condattr_init (pthread_condattr_t * condattr);
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int __pthread_condattr_destroy (pthread_condattr_t * condattr);
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int __pthread_condattr_getpshared (const pthread_condattr_t * attr,
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int *pshared);
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int __pthread_condattr_setpshared (pthread_condattr_t * attr, int pshared);
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/* Thread signal */
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int __pthread_kill (pthread_t * thread, int sig);
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int __pthread_sigmask (int operation, const sigset_t * set,
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sigset_t * old_set);
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/* ID */
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pthread_t __pthread_self ();
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int __pthread_equal (pthread_t * t1, pthread_t * t2);
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/* Mutexes */
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int __pthread_mutex_init (pthread_mutex_t *, const pthread_mutexattr_t *);
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int __pthread_mutex_lock (pthread_mutex_t *);
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int __pthread_mutex_trylock (pthread_mutex_t *);
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int __pthread_mutex_unlock (pthread_mutex_t *);
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int __pthread_mutex_destroy (pthread_mutex_t *);
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/* Semaphores */
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int __sem_init (sem_t * sem, int pshared, unsigned int value);
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int __sem_destroy (sem_t * sem);
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int __sem_wait (sem_t * sem);
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int __sem_trywait (sem_t * sem);
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int __sem_post (sem_t * sem);
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};
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#endif // MT_SAFE
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#endif // _CYGNUS_THREADS_
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