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/* dl_win32.xs
*
* Platform: Win32 (Windows NT/Windows 95)
* Author: Wei-Yuen Tan (wyt@hip.com)
* Created: A warm day in June, 1995
*
* Modified:
* August 23rd 1995 - rewritten after losing everything when I
* wiped off my NT partition (eek!)
*/
/* Porting notes:
I merely took Paul's dl_dlopen.xs, took out extraneous stuff and
replaced the appropriate SunOS calls with the corresponding Win32
calls.
*/
#define WIN32_LEAN_AND_MEAN
#ifdef __GNUC__
#define Win32_Winsock
#endif
#include <windows.h>
#include <string.h>
#define PERL_NO_GET_CONTEXT
#define PERL_EXT
#define PERL_IN_DL_WIN32_XS
#include "EXTERN.h"
#include "perl.h"
#include "win32.h"
#include "XSUB.h"
typedef struct {
SV * x_error_sv;
} my_cxtx_t; /* this *must* be named my_cxtx_t */
#define DL_CXT_EXTRA /* ask for dl_cxtx to be defined in dlutils.c */
#include "dlutils.c" /* SaveError() etc */
#define dl_error_sv (dl_cxtx.x_error_sv)
static char *
OS_Error_String(pTHX)
{
dMY_CXT;
DWORD err = GetLastError();
STRLEN len;
SV ** l_dl_error_svp = &dl_error_sv;
SV * l_dl_error_sv;
if (!*l_dl_error_svp)
*l_dl_error_svp = newSVpvs("");
l_dl_error_sv = *l_dl_error_svp;
PerlProc_GetOSError(l_dl_error_sv,err);
return SvPV(l_dl_error_sv,len);
}
static void
dl_private_init(pTHX)
{
(void)dl_generic_private_init(aTHX);
}
/*
This function assumes the list staticlinkmodules
will be formed from package names with '::' replaced
with '/'. Thus Win32::OLE is in the list as Win32/OLE
*/
static int
dl_static_linked(char *filename)
{
const char * const *p;
char *ptr, *hptr;
static const char subStr[] = "/auto/";
char szBuffer[MAX_PATH];
/* avoid buffer overflow when called with invalid filenames */
if (strlen(filename) >= sizeof(szBuffer))
return 0;
/* change all the '\\' to '/' */
my_strlcpy(szBuffer, filename, sizeof(szBuffer));
for(ptr = szBuffer; ptr = strchr(ptr, '\\'); ++ptr)
*ptr = '/';
/* delete the file name */
ptr = strrchr(szBuffer, '/');
if(ptr != NULL)
*ptr = '\0';
/* remove leading lib path */
ptr = strstr(szBuffer, subStr);
if(ptr != NULL)
ptr += sizeof(subStr)-1;
else
ptr = szBuffer;
for (p = staticlinkmodules; *p;p++) {
if (hptr = strstr(ptr, *p)) {
/* found substring, need more detailed check if module name match */
if (hptr==ptr) {
return strEQ(ptr, *p);
}
if (hptr[strlen(*p)] == 0)
return hptr[-1]=='/';
}
};
return 0;
}
MODULE = DynaLoader PACKAGE = DynaLoader
BOOT:
(void)dl_private_init(aTHX);
void
dl_load_file(filename,flags=0)
char * filename
#flags is unused
SV * flags = NO_INIT
PREINIT:
void *retv;
SV * retsv;
CODE:
{
PERL_UNUSED_VAR(flags);
DLDEBUG(1,PerlIO_printf(Perl_debug_log,"dl_load_file(%s):\n", filename));
if (dl_static_linked(filename) == 0) {
retv = PerlProc_DynaLoad(filename);
}
else
retv = (void*) Win_GetModuleHandle(NULL);
DLDEBUG(2,PerlIO_printf(Perl_debug_log," libref=%x\n", retv));
if (retv == NULL) {
SaveError(aTHX_ "load_file:%s",
OS_Error_String(aTHX)) ;
retsv = &PL_sv_undef;
}
else
retsv = sv_2mortal(newSViv((IV)retv));
ST(0) = retsv;
}
int
dl_unload_file(libref)
void * libref
CODE:
DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_unload_file(%lx):\n", PTR2ul(libref)));
RETVAL = FreeLibrary((HMODULE)libref);
if (!RETVAL)
SaveError(aTHX_ "unload_file:%s", OS_Error_String(aTHX)) ;
DLDEBUG(2,PerlIO_printf(Perl_debug_log, " retval = %d\n", RETVAL));
OUTPUT:
RETVAL
void
dl_find_symbol(libhandle, symbolname, ign_err=0)
void * libhandle
char * symbolname
int ign_err
PREINIT:
void *retv;
CODE:
DLDEBUG(2,PerlIO_printf(Perl_debug_log,"dl_find_symbol(handle=%x, symbol=%s)\n",
libhandle, symbolname));
retv = (void*) GetProcAddress((HINSTANCE) libhandle, symbolname);
DLDEBUG(2,PerlIO_printf(Perl_debug_log," symbolref = %x\n", retv));
ST(0) = sv_newmortal();
if (retv == NULL) {
if (!ign_err) SaveError(aTHX_ "find_symbol:%s", OS_Error_String(aTHX));
} else
sv_setiv( ST(0), (IV)retv);
void
dl_undef_symbols()
CODE:
# These functions should not need changing on any platform:
void
dl_install_xsub(perl_name, symref, filename="$Package")
char * perl_name
void * symref
char * filename
CODE:
DLDEBUG(2,PerlIO_printf(Perl_debug_log,"dl_install_xsub(name=%s, symref=%x)\n",
perl_name, symref));
ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name,
(void(*)(pTHX_ CV *))symref,
filename)));
SV *
dl_error()
CODE:
dMY_CXT;
RETVAL = newSVsv(MY_CXT.x_dl_last_error);
OUTPUT:
RETVAL
#if defined(USE_ITHREADS)
void
CLONE(...)
CODE:
MY_CXT_CLONE;
PERL_UNUSED_VAR(items);
/* MY_CXT_CLONE just does a memcpy on the whole structure, so to avoid
* using Perl variables that belong to another thread, we create our
* own for this thread.
*/
MY_CXT.x_dl_last_error = newSVpvs("");
#endif
# end.
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