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/* perthread.h: Header file for cygwin synchronization primitives.
Copyright 2000, 2001 Red Hat, Inc.
Written by Christopher Faylor <cgf@cygnus.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. */
#define PTMAGIC 0x77366377
struct _reent;
extern struct _reent reent_data;
extern DWORD *__stackbase __asm__ ("%fs:4");
extern __inline struct _reent *
get_reent ()
{
DWORD *base = __stackbase - 1;
if (*base != PTMAGIC)
return &reent_data;
return (struct _reent *) base[-1];
}
extern inline void
set_reent (struct _reent *r)
{
DWORD *base = __stackbase - 1;
*base = PTMAGIC;
base[-1] = (DWORD) r;
}
#define PER_THREAD_FORK_CLEAR ((void *)0xffffffff)
class per_thread
{
DWORD tls;
int clear_on_fork_p;
public:
per_thread (int forkval = 1) {tls = TlsAlloc (); clear_on_fork_p = forkval;}
DWORD get_tls () {return tls;}
int clear_on_fork () {return clear_on_fork_p;}
virtual void *get () {return TlsGetValue (get_tls ());}
virtual size_t size () {return 0;}
virtual void set (void *s = NULL);
virtual void set (int n) {TlsSetValue (get_tls (), (void *)n);}
virtual void *create ()
{
void *s = new char [size ()];
memset (s, 0, size ());
set (s);
return s;
}
};
class per_thread_waitq : public per_thread
{
public:
per_thread_waitq () : per_thread (0) {}
void *get () {return (waitq *) this->per_thread::get ();}
void *create () {return (waitq *) this->per_thread::create ();}
size_t size () {return sizeof (waitq);}
};
#if defined (NEED_VFORK)
struct vfork_save
{
int pid;
jmp_buf j;
DWORD frame[100];
char **vfork_ebp;
char **vfork_esp;
int is_active () { return pid < 0; }
};
class per_thread_vfork : public per_thread
{
public:
vfork_save *val () { return (vfork_save *) this->per_thread::get (); }
vfork_save *create () {return (vfork_save *) this->per_thread::create ();}
size_t size () {return sizeof (vfork_save);}
};
extern per_thread_vfork vfork_storage;
extern vfork_save *main_vfork;
#endif
extern "C" {
struct signal_dispatch
{
int arg;
void (*func) (int);
int sig;
int saved_errno;
int sa_flags;
DWORD oldmask;
DWORD newmask;
DWORD retaddr;
DWORD *retaddr_on_stack;
};
};
struct per_thread_signal_dispatch : public per_thread
{
signal_dispatch *get () { return (signal_dispatch *) this->per_thread::get (); }
signal_dispatch *create () {return (signal_dispatch *) this->per_thread::create ();}
size_t size () {return sizeof (signal_dispatch);}
};
extern per_thread_waitq waitq_storage;
extern per_thread_signal_dispatch signal_dispatch_storage;
extern per_thread *threadstuff[];
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