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/*********************************************************************
* Copyright 1993, UCAR/Unidata
* See netcdf/COPYRIGHT file for copying and redistribution conditions.
* Derived from poco library from Boost Software: see nccpoco/SourceLicence file.
*********************************************************************/
#ifndef NCPOCO_H
#define NCPOCO_H
/* Use NCP or nccp or ncpoco as our "namespace */
/* Forward */
typedef struct NCPSharedLib NCPSharedLib;
typedef enum NCP_Flags NCP_Flags;
enum NCP_Flags {
NCP_GLOBAL = 1, /* (default) use RTLD_GLOBAL; ignored on platforms that do not use dlopen(). */
NCP_LOCAL = 2 /* use RTLD_LOCAL; RTTI will not work with this flag. */
};
struct NCPSharedLib {
char* path;
int flags;
struct NCPstate {
void* handle;
int flags;
} state;
struct {
char msg[4096];
} err;
struct NCPAPI {
int (*init)(NCPSharedLib*);
int (*reclaim)(NCPSharedLib*); /* reclaim resources; do not free lib */
int (*load)(NCPSharedLib*,const char*,int);
int (*unload)(NCPSharedLib*);
int (*isloaded)(NCPSharedLib*);
void* (*getsymbol)(NCPSharedLib*,const char*);
const char* (*getpath)(NCPSharedLib*);
} api;
};
/**************************************************/
/* SharedLib API */
EXTERNL int ncpsharedlibnew(NCPSharedLib**); /* Creates a NCPSharedLib object. */
EXTERNL int ncpsharedlibfree(NCPSharedLib*); /* free this shared library */
/*
Loads a shared library from the given path using specified flags.
Returns error + message if a library has already been loaded or cannot be loaded.
*/
EXTERNL int ncpload(NCPSharedLib*,const char* path, int flags);
EXTERNL int ncpunload(NCPSharedLib*); /* Unloads a shared library. */
EXTERNL int ncpisloaded(NCPSharedLib*); /* Returns 1 iff a library has been loaded.*/
/* Returns the address of the symbol with the given name.
For functions, this is the entry point of the function.
Return NULL if the symbol does not exist
*/
EXTERNL void* ncpgetsymbol(NCPSharedLib*,const char* name);
/* Returns the path of the library, as specified in
a call to load(NCPSharedLib*)
*/
EXTERNL const char* ncpgetpath(NCPSharedLib*);
/* Return last err msg */
EXTERNL const char* ncpgeterrmsg(NCPSharedLib* lib);
EXTERNL const char* intstr(int err1);
#endif /*NCPOCO_H*/
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