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Viewing changes to src/backend/port/dynloader/hpux.c

  • Committer: Bazaar Package Importer
  • Author(s): Martin Pitt
  • Date: 2011-05-11 10:41:53 UTC
  • Revision ID: james.westby@ubuntu.com-20110511104153-psbh2o58553fv1m0
Tags: upstream-9.1~beta1
Import upstream version 9.1~beta1

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src/backend/port/dynloader/hpux.c
 
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/*-------------------------------------------------------------------------
 
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 *
 
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 * dynloader.c
 
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 *        dynamic loader for HP-UX using the shared library mechanism
 
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 *
 
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 * Portions Copyright (c) 1996-2011, PostgreSQL Global Development Group
 
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 * Portions Copyright (c) 1994, Regents of the University of California
 
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 *
 
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 *
 
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 * IDENTIFICATION
 
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 *        src/backend/port/dynloader/hpux.c
 
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 *
 
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 *      NOTES
 
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 *              all functions are defined here -- it's impossible to trace the
 
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 *              shl_* routines from the bundled HP-UX debugger.
 
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 *
 
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 *-------------------------------------------------------------------------
 
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 */
 
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#include "postgres.h"
 
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/* System includes */
 
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#include <a.out.h>
 
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#include <dl.h>
 
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#include "dynloader.h"
 
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#include "utils/dynamic_loader.h"
 
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void *
 
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pg_dlopen(char *filename)
 
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{
 
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        /*
 
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         * Use BIND_IMMEDIATE so that undefined symbols cause a failure return
 
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         * from shl_load(), rather than an abort() later on when we attempt to
 
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         * call the library!
 
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         */
 
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        shl_t           handle = shl_load(filename,
 
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                                                                BIND_IMMEDIATE | BIND_VERBOSE | DYNAMIC_PATH,
 
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                                                                  0L);
 
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        return (void *) handle;
 
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}
 
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PGFunction
 
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pg_dlsym(void *handle, char *funcname)
 
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{
 
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        PGFunction      f;
 
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        if (shl_findsym((shl_t *) & handle, funcname, TYPE_PROCEDURE, &f) == -1)
 
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                f = (PGFunction) NULL;
 
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        return f;
 
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}
 
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void
 
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pg_dlclose(void *handle)
 
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{
 
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        shl_unload((shl_t) handle);
 
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}
 
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char *
 
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pg_dlerror(void)
 
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{
 
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        static char errmsg[] = "shl_load failed";
 
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        if (errno)
 
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                return strerror(errno);
 
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        return errmsg;
 
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}