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vpi_modules.cc
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vpi_modules.cc
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/*
* Copyright (c) 2001-2010 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
# include "config.h"
# include "vpi_priv.h"
# include "ivl_dlfcn.h"
# include "vvp_cleanup.h"
# include <cstdio>
# include <cstring>
# include <sys/types.h>
# include <sys/stat.h>
# include "ivl_alloc.h"
static ivl_dll_t*dll_list = 0;
static unsigned dll_list_cnt = 0;
typedef void (*vlog_startup_routines_t)(void);
const char* vpip_module_path[64] = {
#ifdef MODULE_DIR1
MODULE_DIR1,
#endif
#ifdef MODULE_DIR2
MODULE_DIR2,
#endif
0
};
unsigned vpip_module_path_cnt = 0
#ifdef MODULE_DIR1
+ 1
#endif
#ifdef MODULE_DIR2
+ 1
#endif
;
void load_module_delete(void)
{
for (unsigned idx = 0; idx < dll_list_cnt; idx += 1) {
ivl_dlclose(dll_list[idx]);
}
free(dll_list);
dll_list = 0;
dll_list_cnt = 0;
}
void vpip_load_module(const char*name)
{
struct stat sb;
int rc;
bool export_flag = false;
char buf[4096];
#ifdef __MINGW32__
const char sep = '\\';
#else
const char sep = '/';
#endif
ivl_dll_t dll = 0;
buf[0] = 0; /* terminate the string */
if (strchr(name, sep)) {
/* If the name has at least one directory character in
it, then assume it is a complete name, maybe including any
possible .vpi suffix. */
export_flag = false;
rc = stat(name, &sb);
if (rc != 0) { /* did we find a file? */
/* no, try with a .vpi suffix too */
export_flag = false;
sprintf(buf, "%s.vpi", name);
rc = stat(buf, &sb);
/* Try also with the .vpl suffix. */
if (rc != 0) {
export_flag = true;
sprintf(buf, "%s.vpl", name);
rc = stat(buf, &sb);
}
if (rc != 0) {
fprintf(stderr, "%s: Unable to find module file `%s' "
"or `%s.vpi'.\n", name,name,buf);
return;
}
} else {
strcpy(buf,name); /* yes copy the name into the buffer */
}
} else {
rc = -1;
for (unsigned idx = 0
; (rc != 0) && (idx < vpip_module_path_cnt)
; idx += 1) {
export_flag = false;
sprintf(buf, "%s%c%s.vpi", vpip_module_path[idx], sep, name);
rc = stat(buf,&sb);
if (rc != 0) {
export_flag = true;
sprintf(buf, "%s%c%s.vpl",
vpip_module_path[idx], sep, name);
rc = stat(buf,&sb);
}
}
if (rc != 0) {
fprintf(stderr, "%s: Unable to find a "
"`%s.vpi' module on the search path.\n",
name, name);
return;
}
}
/* must have found some file that could possibly be a vpi module
* try to open it as a shared object.
*/
dll = ivl_dlopen(buf, export_flag);
if(dll==0) {
/* hmm, this failed, let the user know what has really gone wrong */
fprintf(stderr,"%s:`%s' failed to open using dlopen() because:\n"
" %s.\n",name,buf,dlerror());
return;
}
#ifdef __MINGW32__
/* For this check MinGW does not want the leading underscore! */
void*table = ivl_dlsym(dll, "vlog_startup_routines");
#else
void*table = ivl_dlsym(dll, LU "vlog_startup_routines" TU);
#endif
if (table == 0) {
fprintf(stderr, "%s: no vlog_startup_routines\n", name);
ivl_dlclose(dll);
return;
}
/* Add the dll to the list so it can be closed when we are done. */
dll_list_cnt += 1;
dll_list = (ivl_dll_t*)realloc(dll_list, dll_list_cnt*sizeof(ivl_dll_t));
dll_list[dll_list_cnt-1] = dll;
vpi_mode_flag = VPI_MODE_REGISTER;
vlog_startup_routines_t*routines = (vlog_startup_routines_t*)table;
for (unsigned tmp = 0 ; routines[tmp] ; tmp += 1)
(routines[tmp])();
vpi_mode_flag = VPI_MODE_NONE;
}