newlib-cygwin/winsup/cygwin/thread.h

498 lines
12 KiB
C++

/* thread.h: Locking and threading module definitions
Copyright 1998, 1999, 2000 Cygnus Solutions.
Copyright 2001 Red Hat, Inc.
Written by Marco Fuykschot <marco@ddi.nl>
Major update 2001 Robert Collins <rbtcollins@hotmail.com>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifndef _CYGNUS_THREADS_
#define _CYGNUS_THREADS_
#define LOCK_FD_LIST 1
#define LOCK_MEMORY_LIST 2
#define LOCK_MMAP_LIST 3
#define LOCK_DLL_LIST 4
#define WRITE_LOCK 1
#define READ_LOCK 2
extern "C"
{
#if defined (_CYG_THREAD_FAILSAFE) && defined (_MT_SAFE)
void AssertResourceOwner (int, int);
#else
#define AssertResourceOwner(i,ii)
#endif
}
#ifndef _MT_SAFE
#define SetResourceLock(i,n,c)
#define ReleaseResourceLock(i,n,c)
#else
#include <pthread.h>
#include <signal.h>
#include <pwd.h>
#include <grp.h>
#define _NOMNTENT_FUNCS
#include <mntent.h>
extern "C"
{
struct _winsup_t
{
/*
Needed for the group functions
*/
struct group _grp;
char *_namearray[2];
int _grp_pos;
/* console.cc */
unsigned _rarg;
/* dlfcn.cc */
int _dl_error;
char _dl_buffer[256];
/* passwd.cc */
struct passwd _res;
char _pass[_PASSWORD_LEN];
int _pw_pos;
/* path.cc */
struct mntent mntbuf;
int _iteration;
DWORD available_drives;
char mnt_type[80];
char mnt_opts[80];
char mnt_fsname[MAX_PATH];
char mnt_dir[MAX_PATH];
/* strerror */
char _strerror_buf[20];
/* sysloc.cc */
char *_process_ident;
int _process_logopt;
int _process_facility;
int _process_logmask;
/* times.cc */
char timezone_buf[20];
struct tm _localtime_buf;
/* uinfo.cc */
char _username[UNLEN + 1];
};
struct __reent_t
{
struct _reent *_clib;
struct _winsup_t *_winsup;
};
_reent *_reent_clib ();
_winsup_t *_reent_winsup ();
void SetResourceLock (int, int, const char *) __attribute__ ((regparm (3)));
void ReleaseResourceLock (int, int, const char *)
__attribute__ ((regparm (3)));
#ifdef _CYG_THREAD_FAILSAFE
void AssertResourceOwner (int, int);
#else
#define AssertResourceOwner(i,ii)
#endif
}
class per_process;
class pinfo;
class ResourceLocks
{
public:
ResourceLocks ()
{
}
LPCRITICAL_SECTION Lock (int);
void Init ();
void Delete ();
#ifdef _CYG_THREAD_FAILSAFE
DWORD owner;
DWORD count;
#endif
private:
CRITICAL_SECTION lock;
bool inited;
};
#define PTHREAD_MAGIC 0xdf0df045
#define PTHREAD_MUTEX_MAGIC PTHREAD_MAGIC+1
#define PTHREAD_KEY_MAGIC PTHREAD_MAGIC+2
#define PTHREAD_ATTR_MAGIC PTHREAD_MAGIC+3
#define PTHREAD_MUTEXATTR_MAGIC PTHREAD_MAGIC+4
#define PTHREAD_COND_MAGIC PTHREAD_MAGIC+5
#define PTHREAD_CONDATTR_MAGIC PTHREAD_MAGIC+6
#define SEM_MAGIC PTHREAD_MAGIC+7
#define PTHREAD_ONCE_MAGIC PTHREAD_MAGIC+8;
/* verifyable_object should not be defined here - it's a general purpose class */
class verifyable_object
{
public:
long magic;
verifyable_object (long);
~verifyable_object ();
};
int verifyable_object_isvalid (verifyable_object *, long);
class pthread_key:public verifyable_object
{
public:
DWORD dwTlsIndex;
int set (const void *);
void *get ();
pthread_key (void (*)(void *));
~pthread_key ();
};
/* FIXME: test using multiple inheritance and merging key_destructor into pthread_key
* for efficiency */
class pthread_key_destructor
{
public:
void (*destructor) (void *);
pthread_key_destructor *InsertAfter (pthread_key_destructor * node);
pthread_key_destructor *UnlinkNext ();
pthread_key_destructor *Next ();
pthread_key_destructor (void (*thedestructor) (void *), pthread_key * key);
pthread_key_destructor *next;
pthread_key *key;
};
class pthread_key_destructor_list
{
public:
void Insert (pthread_key_destructor * node);
/* remove a given dataitem, wherever in the list it is */
pthread_key_destructor *Remove (pthread_key_destructor * item);
/* get the first item and remove at the same time */
pthread_key_destructor *Pop ();
pthread_key_destructor *Remove (pthread_key * key);
void IterateNull ();
private:
pthread_key_destructor * head;
};
class pthread_attr:public verifyable_object
{
public:
int joinable;
int contentionscope;
int inheritsched;
struct sched_param schedparam;
size_t stacksize;
pthread_attr ();
~pthread_attr ();
};
class pthread:public verifyable_object
{
public:
HANDLE win32_obj_id;
class pthread_attr attr;
void *(*function) (void *);
void *arg;
void *return_ptr;
bool suspended;
int cancelstate, canceltype;
// int joinable;
DWORD GetThreadId ()
{
return thread_id;
}
void setThreadIdtoCurrent ()
{
thread_id = GetCurrentThreadId ();
}
/* signal handling */
struct sigaction *sigs;
sigset_t *sigmask;
LONG *sigtodo;
void create (void *(*)(void *), pthread_attr *, void *);
pthread ();
~pthread ();
private:
DWORD thread_id;
};
class pthread_mutexattr:public verifyable_object
{
public:
int pshared;
int mutextype;
pthread_mutexattr ();
~pthread_mutexattr ();
};
class pthread_mutex:public verifyable_object
{
public:
HANDLE win32_obj_id;
LONG condwaits;
int pshared;
int Lock ();
int TryLock ();
int UnLock ();
pthread_mutex (unsigned short);
pthread_mutex (pthread_mutexattr *);
pthread_mutex (pthread_mutex_t *, pthread_mutexattr *);
~pthread_mutex ();
};
class pthread_condattr:public verifyable_object
{
public:
int shared;
pthread_condattr ();
~pthread_condattr ();
};
class pthread_cond:public verifyable_object
{
public:
int shared;
LONG waiting;
pthread_mutex *mutex;
/* to allow atomic behaviour for cond_broadcast */
pthread_mutex_t cond_access;
HANDLE win32_obj_id;
int TimedWait (DWORD dwMilliseconds);
void BroadCast ();
void Signal ();
pthread_cond (pthread_condattr *);
~pthread_cond ();
};
class pthread_once
{
public:
pthread_mutex_t mutex;
int state;
};
/* shouldn't be here */
class semaphore:public verifyable_object
{
public:
HANDLE win32_obj_id;
int shared;
void Wait ();
void Post ();
int TryWait ();
semaphore (int, unsigned int);
~semaphore ();
};
class callback
{
public:
void (*cb)(void);
class callback * next;
};
class MTinterface
{
public:
// General
DWORD reent_index;
DWORD thread_self_dwTlsIndex;
/* we may get 0 for the Tls index.. grrr */
int indexallocated;
int concurrency;
long int threadcount;
// Used for main thread data, and sigproc thread
struct __reent_t reents;
struct _winsup_t winsup_reent;
pthread mainthread;
pthread_key_destructor_list destructors;
callback *pthread_prepare;
callback *pthread_child;
callback *pthread_parent;
/* this is an associative array for the _exclusive_ use of pshared mutex's
* normal mutex's don't go here to reduce overhead and prevent serialisation.
*/
class pthread_mutex * pshared_mutexs[256];
void Init (int);
MTinterface ():reent_index (0), indexallocated (0), threadcount (1)
{
pthread_prepare = NULL;
pthread_child = NULL;
pthread_parent = NULL;
}
};
void __pthread_atforkprepare(void);
void __pthread_atforkparent(void);
void __pthread_atforkchild(void);
extern "C"
{
void *thread_init_wrapper (void *);
/* ThreadCreation */
int __pthread_create (pthread_t * thread, const pthread_attr_t * attr,
void *(*start_routine) (void *), void *arg);
int __pthread_once (pthread_once_t *, void (*)(void));
int __pthread_atfork(void (*)(void), void (*)(void), void (*)(void));
int __pthread_attr_init (pthread_attr_t * attr);
int __pthread_attr_destroy (pthread_attr_t * attr);
int __pthread_attr_setdetachstate (pthread_attr_t *, int);
int __pthread_attr_getdetachstate (const pthread_attr_t *, int *);
int __pthread_attr_setstacksize (pthread_attr_t * attr, size_t size);
int __pthread_attr_getstacksize (const pthread_attr_t * attr, size_t * size);
int __pthread_attr_getinheritsched (const pthread_attr_t *, int *);
int __pthread_attr_getschedparam (const pthread_attr_t *,
struct sched_param *);
int __pthread_attr_getschedpolicy (const pthread_attr_t *, int *);
int __pthread_attr_getscope (const pthread_attr_t *, int *);
int __pthread_attr_getstackaddr (const pthread_attr_t *, void **);
int __pthread_attr_setinheritsched (pthread_attr_t *, int);
int __pthread_attr_setschedparam (pthread_attr_t *,
const struct sched_param *);
int __pthread_attr_setschedpolicy (pthread_attr_t *, int);
int __pthread_attr_setscope (pthread_attr_t *, int);
int __pthread_attr_setstackaddr (pthread_attr_t *, void *);
/* Thread Exit */
void __pthread_exit (void *value_ptr);
int __pthread_join (pthread_t * thread, void **return_val);
int __pthread_detach (pthread_t * thread);
/* Thread suspend */
int __pthread_suspend (pthread_t * thread);
int __pthread_continue (pthread_t * thread);
unsigned long __pthread_getsequence_np (pthread_t * thread);
/* Thread SpecificData */
int __pthread_key_create (pthread_key_t * key, void (*destructor) (void *));
int __pthread_key_delete (pthread_key_t key);
int __pthread_setspecific (pthread_key_t key, const void *value);
void *__pthread_getspecific (pthread_key_t key);
/* Thead synchroniation */
int __pthread_cond_destroy (pthread_cond_t * cond);
int __pthread_cond_init (pthread_cond_t * cond,
const pthread_condattr_t * attr);
int __pthread_cond_signal (pthread_cond_t * cond);
int __pthread_cond_broadcast (pthread_cond_t * cond);
int __pthread_cond_timedwait (pthread_cond_t * cond,
pthread_mutex_t * mutex,
const struct timespec *abstime);
int __pthread_cond_wait (pthread_cond_t * cond, pthread_mutex_t * mutex);
int __pthread_condattr_init (pthread_condattr_t * condattr);
int __pthread_condattr_destroy (pthread_condattr_t * condattr);
int __pthread_condattr_getpshared (const pthread_condattr_t * attr,
int *pshared);
int __pthread_condattr_setpshared (pthread_condattr_t * attr, int pshared);
/* Thread signal */
int __pthread_kill (pthread_t thread, int sig);
int __pthread_sigmask (int operation, const sigset_t * set,
sigset_t * old_set);
/* ID */
pthread_t __pthread_self ();
int __pthread_equal (pthread_t * t1, pthread_t * t2);
/* Mutexes */
int __pthread_mutex_init (pthread_mutex_t *, const pthread_mutexattr_t *);
int __pthread_mutex_lock (pthread_mutex_t *);
int __pthread_mutex_trylock (pthread_mutex_t *);
int __pthread_mutex_unlock (pthread_mutex_t *);
int __pthread_mutex_destroy (pthread_mutex_t *);
int __pthread_mutex_setprioceiling (pthread_mutex_t * mutex,
int prioceiling, int *old_ceiling);
int __pthread_mutex_getprioceiling (const pthread_mutex_t * mutex,
int *prioceiling);
int __pthread_mutexattr_destroy (pthread_mutexattr_t *);
int __pthread_mutexattr_getprioceiling (const pthread_mutexattr_t *, int *);
int __pthread_mutexattr_getprotocol (const pthread_mutexattr_t *, int *);
int __pthread_mutexattr_getpshared (const pthread_mutexattr_t *, int *);
int __pthread_mutexattr_gettype (const pthread_mutexattr_t *, int *);
int __pthread_mutexattr_init (pthread_mutexattr_t *);
int __pthread_mutexattr_setprioceiling (pthread_mutexattr_t *, int);
int __pthread_mutexattr_setprotocol (pthread_mutexattr_t *, int);
int __pthread_mutexattr_setpshared (pthread_mutexattr_t *, int);
int __pthread_mutexattr_settype (pthread_mutexattr_t *, int);
/* Scheduling */
int __pthread_getconcurrency (void);
int __pthread_setconcurrency (int new_level);
int __pthread_getschedparam (pthread_t thread, int *policy,
struct sched_param *param);
int __pthread_setschedparam (pthread_t thread, int policy,
const struct sched_param *param);
/* cancelability states */
int __pthread_cancel (pthread_t thread);
int __pthread_setcancelstate (int state, int *oldstate);
int __pthread_setcanceltype (int type, int *oldtype);
void __pthread_testcancel (void);
/* Semaphores */
int __sem_init (sem_t * sem, int pshared, unsigned int value);
int __sem_destroy (sem_t * sem);
int __sem_wait (sem_t * sem);
int __sem_trywait (sem_t * sem);
int __sem_post (sem_t * sem);
};
#endif // MT_SAFE
#endif // _CYGNUS_THREADS_