/*
 * Author: Jeff Okamoto (okamoto@corp.hp.com)
 * Version: 2.1, 1995/1/25
 */
/* o Added BIND_VERBOSE to dl_nonlazy condition to add names of missing
 *   symbols to stderr message on fatal error.
 *
 * o Added BIND_NONFATAL comment to default condition.
 *
 * Chuck Phillips (cdp@fc.hp.com)
 * Version: 2.2, 1997/5/4 */
#ifdef __hp9000s300
#define magic hpux_magic
#define MAGIC HPUX_MAGIC
#endif
#include <dl.h>
#ifdef __hp9000s300
#undef magic
#undef MAGIC
#endif
#define PERL_EXT
#include "EXTERN.h"
#define PERL_IN_DL_HPUX_XS
#include "perl.h"
#include "XSUB.h"
typedef struct {
    AV *        x_resolve_using;
} 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"    /* for SaveError() etc */
#define dl_resolve_using        (dl_cxtx.x_resolve_using)
static void
dl_private_init(pTHX)
{
    (void)dl_generic_private_init(aTHX);
    {
        dMY_CXT;
        dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI);
    }
}
MODULE = DynaLoader     PACKAGE = DynaLoader
BOOT:
    (void)dl_private_init(aTHX);
void
dl_load_file(filename, flags=0)
    char *      filename
    int         flags
    PREINIT:
    shl_t obj = NULL;
    int i, max, bind_type;
    dMY_CXT;
    CODE:
    DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags));
    if (flags & 0x01)
        Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename);
    if (dl_nonlazy) {
      bind_type = BIND_IMMEDIATE|BIND_VERBOSE;
    } else {
      bind_type = BIND_DEFERRED;
      /* For certain libraries, like DCE, deferred binding often causes run
       * time problems.  Adding BIND_NONFATAL to BIND_IMMEDIATE still allows
       * unresolved references in situations like this.  */
      /* bind_type = BIND_IMMEDIATE|BIND_NONFATAL; */
    }
    /* BIND_NOSTART removed from bind_type because it causes the shared library's       */
    /* initialisers not to be run.  This causes problems with all of the static objects */
    /* in the library.     */
#ifdef DEBUGGING
    if (dl_debug)
        bind_type |= BIND_VERBOSE;
#endif /* DEBUGGING */
    max = AvFILL(dl_resolve_using);
    for (i = 0; i <= max; i++) {
        char *sym = SvPVX(*av_fetch(dl_resolve_using, i, 0));
        DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s) (dependent)\n", sym));
        obj = shl_load(sym, bind_type, 0L);
        if (obj == NULL) {
            goto end;
        }
    }
    DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s): ", filename));
    obj = shl_load(filename, bind_type, 0L);
    DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%p\n", (void*)obj));
end:
    ST(0) = newSV_type_mortal(SVt_IV);
    if (obj == NULL)
        SaveError(aTHX_ "%s",Strerror(errno));
    else
        sv_setiv( ST(0), PTR2IV(obj) );
int
dl_unload_file(libref)
    void *      libref
  CODE:
    DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_unload_file(%lx):\n", PTR2ul(libref)));
    RETVAL = (shl_unload((shl_t)libref) == 0 ? 1 : 0);
    if (!RETVAL)
        SaveError(aTHX_ "%s", Strerror(errno));
    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:
    shl_t obj = (shl_t) libhandle;
    void *symaddr = NULL;
    int status;
    CODE:
#ifdef __hp9000s300
    symbolname = Perl_form_nocontext("_%s", symbolname);
#endif
    DLDEBUG(2, PerlIO_printf(Perl_debug_log,
                             "dl_find_symbol(handle=%lx, symbol=%s)\n",
                             (unsigned long) libhandle, symbolname));
    ST(0) = newSV_type_mortal(SVt_IV);
    errno = 0;
    status = shl_findsym(&obj, symbolname, TYPE_PROCEDURE, &symaddr);
    DLDEBUG(2,PerlIO_printf(Perl_debug_log, "  symbolref(PROCEDURE) = %p\n", (void*)symaddr));
    if (status == -1 && errno == 0) {   /* try TYPE_DATA instead */
        status = shl_findsym(&obj, symbolname, TYPE_DATA, &symaddr);
        DLDEBUG(2,PerlIO_printf(Perl_debug_log, "  symbolref(DATA) = %p\n", (void*)symaddr));
    }
    if (status == -1) {
        if (!ign_err) SaveError(aTHX_ "%s",(errno) ? Strerror(errno) : "Symbol not found") ;
    } else {
        sv_setiv( ST(0), PTR2IV(symaddr) );
    }
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 
    const char *        filename
    CODE:
    DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%p)\n",
                            perl_name, (void*)symref));
    ST(0) = sv_2mortal(newRV((SV*)newXS_flags(perl_name,
                                              (void(*)(pTHX_ CV *))symref,
                                              filename, NULL,
                                              XS_DYNAMIC_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("");
    dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI);
#endif
# end.