ermyth/src/linker.C

/*
 * linker.C: Abstraction of the dynamic linking system.
 * Rights to this code are documented in doc/pod/license.pod.
 *
 * Copyright © 2005-2007 Atheme Project (http://www.atheme.org)           
 */

static char const rcsid[] = "$Id: linker.C,v 1.3 2007-07-21 13:23:22 pippijn Exp $";

#include "atheme.h"

#include <dlfcn.h>

#ifdef __OpenBSD__
# define RTLD_NOW RTLD_LAZY
#endif

#ifndef __HPUX__
# define PLATFORM_SUFFIX ".so"
#else
# define PLATFORM_SUFFIX ".sl"
#endif

/*
 * linker_open()
 *
 * Inputs:
 *       path to file to open
 *
 * Outputs:
 *       linker handle.
 *
 * Side Effects:
 *       a shared module is loaded into the application's memory space
 */
void *
linker_open (char *path)
{
  return dlopen (path, RTLD_NOW);
}

/*
 * linker_open_ext()
 *
 * Inputs:
 *       path to file to open
 *
 * Outputs:
 *       linker handle
 *
 * Side Effects:
 *       the extension is appended if it's not already there.
 *       a shared module is loaded into the application's memory space
 */
void *
linker_open_ext (char *path)
{
  void *handle;
  char *buf = static_cast<char *> (smalloc (strlen (path) + 20));

  strlcpy (buf, path, strlen (path) + 20);

  if (!strstr (buf, PLATFORM_SUFFIX))
    strlcat (buf, PLATFORM_SUFFIX, strlen (path) + 20);

  handle = linker_open (buf);
  free (buf);

  return handle;
}

/*
 * linker_getsym()
 *
 * Inputs:
 *       linker handle, symbol to retrieve
 *
 * Outputs:
 *       pointer to symbol, or NULL if no symbol.
 *
 * Side Effects:
 *       none
 */
void *
linker_getsym (void *vptr, char *sym)
{
  return dlsym (vptr, sym);
}

/*
 * linker_close()
 *
 * Inputs:
 *       linker handle
 *
 * Outputs:
 *       none
 *
 * Side Effects:
 *       the module is unloaded from the linker
 */
void
linker_close (void *vptr)
{
  dlclose (vptr);
}
Revision:	1.4
Committed:	Tue Aug 28 17:12:24 2007 UTC (16 years, 8 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.3:	+1 -1 lines
State:	*FILE REMOVED*
Log Message:	removed old files
#	Content
1	/*
2	* linker.C: Abstraction of the dynamic linking system.
3	* Rights to this code are documented in doc/pod/license.pod.
4	*
5	* Copyright © 2005-2007 Atheme Project (http://www.atheme.org)
6	*/
7
8	static char const rcsid[] = "$Id: linker.C,v 1.3 2007-07-21 13:23:22 pippijn Exp $";
9
10	#include "atheme.h"
11
12	#include <dlfcn.h>
13
14	#ifdef __OpenBSD__
15	# define RTLD_NOW RTLD_LAZY
16	#endif
17
18	#ifndef __HPUX__
19	# define PLATFORM_SUFFIX ".so"
20	#else
21	# define PLATFORM_SUFFIX ".sl"
22	#endif
23
24	/*
25	* linker_open()
26	*
27	* Inputs:
28	* path to file to open
29	*
30	* Outputs:
31	* linker handle.
32	*
33	* Side Effects:
34	* a shared module is loaded into the application's memory space
35	*/
36	void *
37	linker_open (char *path)
38	{
39	return dlopen (path, RTLD_NOW);
40	}
41
42	/*
43	* linker_open_ext()
44	*
45	* Inputs:
46	* path to file to open
47	*
48	* Outputs:
49	* linker handle
50	*
51	* Side Effects:
52	* the extension is appended if it's not already there.
53	* a shared module is loaded into the application's memory space
54	*/
55	void *
56	linker_open_ext (char *path)
57	{
58	void *handle;
59	char buf = static_cast<char > (smalloc (strlen (path) + 20));
60
61	strlcpy (buf, path, strlen (path) + 20);
62
63	if (!strstr (buf, PLATFORM_SUFFIX))
64	strlcat (buf, PLATFORM_SUFFIX, strlen (path) + 20);
65
66	handle = linker_open (buf);
67	free (buf);
68
69	return handle;
70	}
71
72	/*
73	* linker_getsym()
74	*
75	* Inputs:
76	* linker handle, symbol to retrieve
77	*
78	* Outputs:
79	* pointer to symbol, or NULL if no symbol.
80	*
81	* Side Effects:
82	* none
83	*/
84	void *
85	linker_getsym (void vptr, char sym)
86	{
87	return dlsym (vptr, sym);
88	}
89
90	/*
91	* linker_close()
92	*
93	* Inputs:
94	* linker handle
95	*
96	* Outputs:
97	* none
98	*
99	* Side Effects:
100	* the module is unloaded from the linker
101	*/
102	void
103	linker_close (void *vptr)
104	{
105	dlclose (vptr);
106	}