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Improved deleting plugins in case the plugin uses its own memory management

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This commit is contained in:
Klaus Schmidinger
2020-06-29 09:29:06 +02:00
parent a526eee165
commit 5193fd9d99
4 changed files with 23 additions and 7 deletions
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1
CONTRIBUTORS
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@@ -2761,6 +2761,7 @@ Winfried K
for fixing some copy&paste errors in PLUGINS.html
for fixing the size of cChannel::dtypes[]
for adding a device hook for detecting whether a device provides EIT data
for improving deleting plugins in case the plugin uses its own memory management
Hans-Werner Hilse <hilse@web.de>
for adding the command line option --userdump to enable core dumps in case VDR

6
HISTORY
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@@ -9498,3 +9498,9 @@ Video Disk Recorder Revision History
two bonded devices, which was "fixed" in version 1.7.29. Apparently this fix merely
rendered the whole code branch inactive. Now this branch is only executed for devices
that are not bonded.
2020-06-29:
- Improved deleting plugins in case the plugin uses its own memory management (thanks
to Winfried K<>hler). Plugins that have been compiled with previous versions of VDR
do not need to be recompiled, they will silently be handled as before.

15
plugin.c
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@@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: plugin.c 4.1 2015/04/18 14:51:20 kls Exp $
* $Id: plugin.c 4.2 2020/06/29 09:29:06 kls Exp $
*/
#include "plugin.h"
@@ -182,11 +182,15 @@ cDll::cDll(const char *FileName, const char *Args)
args = Args ? strdup(Args) : NULL;
handle = NULL;
plugin = NULL;
destroy = NULL;
}
cDll::~cDll()
{
delete plugin;
if (destroy)
destroy(plugin);
else
delete plugin; // silently fall back for plugins compiled with VDR version <= 2.4.3
if (handle)
dlclose(handle);
free(args);
@@ -223,10 +227,11 @@ bool cDll::Load(bool Log)
handle = dlopen(fileName, RTLD_NOW);
const char *error = dlerror();
if (!error) {
void *(*creator)(void);
creator = (void *(*)(void))dlsym(handle, "VDRPluginCreator");
typedef cPlugin *create_t(void);
create_t *create = (create_t *)dlsym(handle, "VDRPluginCreator");
if (!(error = dlerror()))
plugin = (cPlugin *)creator();
plugin = create();
destroy = (destroy_t *)dlsym(handle, "VDRPluginDestroyer");
}
if (!error) {
if (plugin && args) {

8
plugin.h
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@@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: plugin.h 2.2 2012/09/01 13:08:54 kls Exp $
* $Id: plugin.h 4.1 2020/06/29 09:29:06 kls Exp $
*/
#ifndef __PLUGIN_H
@@ -15,7 +15,9 @@
#include "osdbase.h"
#include "tools.h"
#define VDRPLUGINCREATOR(PluginClass) extern "C" void *VDRPluginCreator(void) { return new PluginClass; }
#define VDRPLUGINCREATOR(PluginClass) \
extern "C" void *VDRPluginCreator(void) { return new PluginClass; } \
extern "C" void VDRPluginDestroyer(PluginClass *p) { delete p; }
class cPlugin {
friend class cDll;
@@ -71,6 +73,8 @@ private:
char *args;
void *handle;
cPlugin *plugin;
typedef void destroy_t(cPlugin *);
destroy_t *destroy;
public:
cDll(const char *FileName, const char *Args);
virtual ~cDll();