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/* perthread.h: Header file for cygwin thread-local storage.
Copyright 2000, 2001, 2002, 2003, 2004 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
#define PER_THREAD_FORK_CLEAR ((void *)UINT32_MAX)
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 = calloc (1, size ());
set (s);
return s;
}
};
#ifdef NEED_VFORK
#include "cygtls.h"
#endif
#ifndef NEWVFORK
#define VFORKPID 0
#else
#if defined (NEED_VFORK)
class vfork_save
{
jmp_buf j;
int exitval;
public:
int pid;
DWORD frame[100];
_cygtls tls;
char **vfork_ebp;
char **vfork_esp;
int ctty;
pid_t sid;
pid_t pgid;
int open_fhs;
int is_active () { return pid < 0; }
void restore_pid (int val)
{
pid = val;
longjmp (j, 1);
}
void restore_exit (int val)
{
exitval = val;
longjmp (j, 1);
}
friend int vfork ();
};
class per_thread_vfork : public per_thread
{
public:
vfork_save *val () { return (vfork_save *) per_thread::get (); }
vfork_save *create () {return (vfork_save *) per_thread::create ();}
size_t size () {return sizeof (vfork_save);}
};
extern per_thread_vfork vfork_storage;
extern vfork_save *main_vfork;
#define VFORKPID main_vfork->pid
#endif
#endif /*NEWVFORK*/
extern per_thread *threadstuff[];
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