newlib-cygwin/winsup/cygwin/dll_init.h

119 lines
2.1 KiB
C++

/* dll_init.h
Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007, 2008,
2009 Red Hat, Inc.
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. */
struct per_module
{
char ***envptr;
void (**ctors)(void);
void (**dtors)(void);
void *data_start;
void *data_end;
void *bss_start;
void *bss_end;
int (*main)(int, char **, char **);
per_module &operator = (per_process *p)
{
envptr = p->envptr;
ctors = p->ctors;
dtors = p->dtors;
data_start = p->data_start;
data_end = p->data_end;
bss_start = p->bss_start;
bss_end = p->bss_end;
main = p->main;
return *this;
}
void run_ctors ();
void run_dtors ();
};
typedef enum
{
DLL_NONE,
DLL_LINK,
DLL_LOAD,
DLL_ANY
} dll_type;
struct dll
{
struct dll *next, *prev;
per_module p;
HMODULE handle;
int count;
bool has_dtors;
dll_type type;
WCHAR name[1];
void detach ();
int init ();
void run_dtors ()
{
if (has_dtors)
{
has_dtors = 0;
p.run_dtors ();
}
}
};
#define MAX_DLL_BEFORE_INIT 100
class dll_list
{
dll *end;
dll *hold;
dll_type hold_type;
static muto protect;
public:
dll start;
int tot;
int loaded_dlls;
int reload_on_fork;
dll *operator [] (const PWCHAR name);
dll *alloc (HINSTANCE, per_process *, dll_type);
dll *find (void *);
void detach (void *);
void init ();
void load_after_fork (HANDLE);
dll *inext ()
{
while ((hold = hold->next))
if (hold_type == DLL_ANY || hold->type == hold_type)
break;
return hold;
}
dll *istart (dll_type t)
{
hold_type = t;
hold = &start;
return inext ();
}
void guard(bool lockit)
{
if (lockit)
protect.acquire ();
else
protect.release ();
}
friend void dll_global_dtors ();
dll_list () { protect.init ("dll_list"); }
};
extern dll_list dlls;
void dll_global_dtors ();
/* These probably belong in a newlib header but we can keep them here
for now. */
extern "C" int __cxa_atexit(void (*)(void*), void*, void*);
extern "C" int __cxa_finalize(void*);