LSST Applications g0b6bd0c080+a72a5dd7e6,g1182afd7b4+2a019aa3bb,g17e5ecfddb+2b8207f7de,g1d67935e3f+06cf436103,g38293774b4+ac198e9f13,g396055baef+6a2097e274,g3b44f30a73+6611e0205b,g480783c3b1+98f8679e14,g48ccf36440+89c08d0516,g4b93dc025c+98f8679e14,g5c4744a4d9+a302e8c7f0,g613e996a0d+e1c447f2e0,g6c8d09e9e7+25247a063c,g7271f0639c+98f8679e14,g7a9cd813b8+124095ede6,g9d27549199+a302e8c7f0,ga1cf026fa3+ac198e9f13,ga32aa97882+7403ac30ac,ga786bb30fb+7a139211af,gaa63f70f4e+9994eb9896,gabf319e997+ade567573c,gba47b54d5d+94dc90c3ea,gbec6a3398f+06cf436103,gc6308e37c7+07dd123edb,gc655b1545f+ade567573c,gcc9029db3c+ab229f5caf,gd01420fc67+06cf436103,gd877ba84e5+06cf436103,gdb4cecd868+6f279b5b48,ge2d134c3d5+cc4dbb2e3f,ge448b5faa6+86d1ceac1d,gecc7e12556+98f8679e14,gf3ee170dca+25247a063c,gf4ac96e456+ade567573c,gf9f5ea5b4d+ac198e9f13,gff490e6085+8c2580be5c,w.2022.27
LSST Data Management Base Package
library.h
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1#ifndef LSST_BASE_LIBRARY_H
2#define LSST_BASE_LIBRARY_H
3
4#include <stdexcept>
5#include <string>
6
7#include <dlfcn.h>
8#ifndef RTLD_DEEPBIND // Non-POSIX flag, so it may not exist
9#define RTLD_DEEPBIND 0 // Will be ignored
10#endif
11
12namespace lsst {
13namespace base {
14
17public:
19 std::runtime_error("Unable to dynamically load library " + name) {};
20 LibraryException(std::string const& lib, std::string const& func) :
21 std::runtime_error("Unable to find function " + func + " from dynamically loaded library " + lib) {};
22};
23
28
34
40 std::string const& libName
41 );
42
43
50template <typename T>
52 std::string const& libName,
53 std::string const& symName
54 )
55{
56 void* lib = dlopen(getLibraryFilename(libName).c_str(), RTLD_NOW | RTLD_GLOBAL | RTLD_DEEPBIND);
57 if (!lib) {
58 throw LibraryException(libName);
59 }
60
61 T* sym;
62 (void*&)sym = dlsym(lib, symName.c_str());
63 if (!sym) {
64 throw LibraryException(libName, symName);
65 }
66 return sym;
67}
68
69}} // lsst::base
70
71
72#endif
table::Key< std::string > name
Definition: Amplifier.cc:116
T c_str(T... args)
Unable to load library.
Definition: library.h:16
LibraryException(std::string const &name)
Definition: library.h:18
LibraryException(std::string const &lib, std::string const &func)
Definition: library.h:20
#define RTLD_DEEPBIND
Definition: library.h:9
bool canLoadLibrary(std::string const &libName)
Return whether we can load a library.
Definition: library.cc:37
std::string getLibraryFilename(std::string const &name)
Get filename for library.
Definition: library.cc:27
std::string libraryExtension()
Return filename extension for libraries.
Definition: library.cc:17
T * loadSymbol(std::string const &libName, std::string const &symName)
Load a symbol from a dynamic library.
Definition: library.h:51
A base class for image defects.
STL namespace.