mirror of
https://github.com/stefanocasazza/ULib.git
synced 2025-09-28 19:05:55 +08:00
134 lines
2.2 KiB
C++
134 lines
2.2 KiB
C++
// ============================================================================
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//
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// = LIBRARY
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// ULib - c++ library
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//
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// = FILENAME
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// dynamic.h
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//
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// = AUTHOR
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// Stefano Casazza
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//
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// ============================================================================
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#ifndef ULIB_DYNAMIC_H
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#define ULIB_DYNAMIC_H 1
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#include <ulib/string.h>
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#if defined(HAVE_DLFCN_H)
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extern "C" {
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# include <dlfcn.h>
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}
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# ifndef RTLD_GLOBAL
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# define RTLD_GLOBAL 0
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# endif
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#endif
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#ifdef HAVE_SHL_LOAD
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#include <dl.h>
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#endif
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#ifndef _MSWINDOWS_
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typedef void* HINSTANCE;
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#endif
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enum DynamicPageType {
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U_DPAGE_INIT = -1,
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U_DPAGE_RESET = -2,
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U_DPAGE_DESTROY = -3,
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U_DPAGE_SIGHUP = -4,
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U_DPAGE_FORK = -5
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};
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/**
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* @class UDynamic
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* @short Dynamic class file loader
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*
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* This class is used to load object files. On elf based systems this is typically done with dlopen
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*/
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class UString;
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class UOrmSession;
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class UServer_Base;
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class U_EXPORT UDynamic {
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public:
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// Check for memory error
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U_MEMORY_TEST
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// Allocator e Deallocator
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U_MEMORY_ALLOCATOR
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U_MEMORY_DEALLOCATOR
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UDynamic()
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{
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U_TRACE_NO_PARAM(0, "UDynamic::UDynamic()")
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err = "none";
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addr = 0;
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handle = 0;
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}
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~UDynamic()
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{
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U_TRACE_NO_PARAM(0, "UDynamic::~UDynamic()")
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}
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/**
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* Load a object file
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*
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* @param name of object to load
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*/
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bool load(const char* pathname);
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bool load(const char* name, uint32_t name_len);
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/**
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* Detach a DSO object from running memory
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*/
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void close();
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/**
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* Lookup a symbol in the loaded file
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*/
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void* operator[](const char* sym);
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/**
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* Retrieve error indicator associated with DSO failure
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*/
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const char* getError() const { return err; }
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static void* getAddressOfFunction(const char* name);
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static void setPluginDirectory(const UString& dir);
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// DEBUG
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#if defined(U_STDCPP_ENABLE) && defined(DEBUG)
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const char* dump(bool reset) const;
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#endif
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protected:
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void* addr;
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const char* err;
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HINSTANCE handle;
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static void clear();
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static UDynamic* pmain;
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static UString* plugin_dir;
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private:
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U_DISALLOW_COPY_AND_ASSIGN(UDynamic)
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friend class UOrmSession;
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friend class UServer_Base;
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};
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#endif
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