#include <dlfcn.h>
void *dlopen(const char *file,
int mode);
dlopen() makes an executable object file specified by
file available to the calling program.
A successful dlopen() returns a handle for use in
subsequent calls to dlsym() and
dlclose().
The value of this handle should not be interpreted in any way by the caller.
Only a single copy of the object file is brought into the address space,
even if dlopen() is invoked multiple times in reference
to the file, and even if different path names are used to reference the file.
- file
-
Specifies the object file to load.
If file is not an absolute path, an
implementation-defined algorithm is used to locate the file.
If file is NULL, dlopen()
provides a handle to the calling program itself.
- mode
-
Specifies the mode in which symbols should be bound.
This may be either RTLD_LAZY or RTLD_NOW.
These values are interpreted identically; symbols are always bound at
load time.
Both are recognized for maximum source compatibility, since
there is no operational difference.
On success, dlopen() returns a pointer which can be passed
in subsequent calls to dlsym() and
dlclose(). It returns a NULL on return.
More detailed diagnostic information is available through the
dlerror() function.
UNIX 98, with exceptions.
MT-Safe.
dlopen() is implemented as a pass-through to the Win32
function LoadLibrary(), and hence does not have all of
the features available on some UNIX platforms.
The modes RTLD_LAZY and RTLD_NOW are interpreted
identically, and the modifiers RTLD_GLOBAL and
RTLD_LOCAL specified in UNIX 98 are ignored (the Windows
behavior is always equivalent to RTLD_NOW|RTLD_LOCAL).
Please refer to the Win32 online documentation for more detailed
information, in particular, the search order used if name
is not an absolute path.
File names are treated as multibyte sequences and are converted to Unicode (UTF-16)
before passing to Win32. The conversion is either performed based on the
current thread locale, set using uselocale() or the process locale
as set by a call to setlocale(), and overridden by _NutConf()
_NC_SET_ANSI_LOCALE and _NC_SET_UTF8_LOCALE options. Under all other
conditions, the multibyte sequences are considered to be from the ANSI code page for the current windows system locale.
PTC MKS Toolkit for Professional Developers
PTC MKS Toolkit for Professional Developers 64-Bit Edition
PTC MKS Toolkit for Enterprise Developers
PTC MKS Toolkit for Enterprise Developers 64-Bit Edition
- Functions:
- dlclose(), dlerror(), dlsym()
PTC MKS Toolkit 10.4 Documentation Build 39.