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