newlib/winsup/cygwin/thread.h

306 lines
6.1 KiB
C++

/* thread.h: Locking and threading module definitions
Copyright 1998, 1999, 2000 Cygnus Solutions.
Written by Marco Fuykschot <marco@ddi.nl>
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 LOCK_THREAD_LIST 5
#define LOCK_MUTEX_LIST 6
#define LOCK_SEM_LIST 7
#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 <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];
char _linebuf[100];
int _grp_pos;
/* console.cc */
unsigned _rarg;
char _my_title_buf[TITLESIZE + 1];
/* dlfcn.cc */
int _dl_error;
char _dl_buffer[256];
/* passwd.cc */
struct passwd _res;
char _tmpbuf[100];
char _pass[_PASSWORD_LEN];
int _pw_pos;
/* path.cc */
struct mntent _ret;
int _iteration;
/* strerror */
char _strerror_buf[20];
/* syscalls.cc */
char _dacl_buf[1024];
char _sacl_buf[1024];
char _ownr_buf[1024];
char _grp_buf[1024];
/* sysloc.cc */
char *_process_ident;
int _process_logopt;
int _process_facility;
int _process_logmask;
/* times.cc */
char _b[20];
struct tm _localtime_buf;
char _buf1[33];
char _buf2[33];
/* uinfo.cc */
char _username[MAX_USER_NAME];
};
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 MT_MAX_ITEMS 128
// thread classes\lists
class MTitem
{
public:
HANDLE win32_obj_id;
UINT return_value;
bool used;
char joinable; // for thread only
bool HandleOke () {return win32_obj_id;}
virtual void Destroy ();
virtual int Id () {return (int) win32_obj_id;}
};
class ThreadItem: public MTitem
{
public:
pthread_attr_t attr;
TFD (function);
void *arg;
void *return_ptr;
bool suspended;
DWORD thread_id;
DWORD GetThreadId () {return thread_id;}
/* signal handling */
struct sigaction *sigs;
sigset_t *sigmask;
LONG *sigtodo;
};
class MutexItem: public MTitem
{
public:
int Lock ();
int TryLock ();
int UnLock ();
};
class SemaphoreItem: public MTitem
{
public:
int shared;
int Wait ();
int Post ();
int TryWait ();
};
typedef struct
{
MTitem *items[MT_MAX_ITEMS];
int index;
} MTList;
class MTinterface
{
public:
// General
DWORD reent_index;
DWORD thread_key;
// Used for main thread data, and sigproc thread
struct __reent_t reents;
struct _winsup_t winsup_reent;
ThreadItem mainthread;
void Init (int);
void ReleaseItem (MTitem *);
// Thread functions
ThreadItem *CreateThread (pthread_t *, TFD (func), void *, pthread_attr_t);
ThreadItem *GetCallingThread ();
ThreadItem *GetThread (pthread_t *);
// Mutex functions
MutexItem *CreateMutex (pthread_mutex_t *);
MutexItem *GetMutex (pthread_mutex_t *);
// Semaphore functions
SemaphoreItem *CreateSemaphore (sem_t *, int, int);
SemaphoreItem *GetSemaphore (sem_t * t);
private:
// General Administration
MTitem * Find (void *, int (*compare) (void *, void *), int &, MTList *);
MTitem *GetItem (int, MTList *);
MTitem *SetItem (int, MTitem *, MTList *);
int Find (MTitem &, MTList *);
int FindNextUnused (MTList *);
MTList threadlist;
MTList mutexlist;
MTList semalist;
};
extern "C"
{
void *thread_init_wrapper (void *);
/* ThreadCreation */
int __pthread_create (pthread_t * thread, const pthread_attr_t * attr, TFD (start_routine), void *arg);
int __pthread_attr_init (pthread_attr_t * attr);
int __pthread_attr_destroy (pthread_attr_t * attr);
int __pthread_attr_setstacksize (pthread_attr_t * attr, size_t size);
int __pthread_attr_getstacksize (pthread_attr_t * attr, size_t * size);
/*
__pthread_attr_setstackaddr(...);
__pthread_attr_getstackaddr(...);
*/
/* Thread Exit */
int __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);
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);
/* 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 *);
/* 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_