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update dlopen implement 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1219 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
qiuyiuestc 2010-12-20 15:42:54 +00:00
parent f18a82d59b
commit 32d13198df
1 changed files with 22 additions and 12 deletions
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34
components/libdl/dlopen.c
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@ -15,24 +15,34 @@
#include <rtthread.h>
#include <rtm.h>
#define MODULE_ROOT_DIR "/module"
void* dlopen(const char *filename, int flags)
{
rt_module_t module;
char *fullpath;
const char*def_path = MODULE_ROOT_DIR;
/* check parameters */
RT_ASSERT(filename != RT_NULL);
/* find in module list */
module = rt_module_find(filename);
if (filename[0] != '/') /* it's a absolute path, use it directly */
{
fullpath = rt_malloc(strlen(def_path) + strlen(filename) + 2);
/* join path and file name */
rt_snprintf(fullpath, strlen(def_path) + strlen(filename) + 2,
"%s/%s", def_path, filename);
}
if(module)
{
module->nref++;
return (void*)module;
}
else
{
module = rt_module_open(filename);
}
/* find in module list */
module = rt_module_find(fullpath);
if(module != RT_NULL) module->nref++;
else module = rt_module_open(fullpath);
rt_free(fullpath);
return (void*)module;
}
RTM_EXPORT(dlopen)