doc/man/man3/dlclose.3

   1 .Dd Nov 6, 2006
   2 .Dt DLCLOSE 3
   3 .Sh NAME
   4 .Nm dlclose
   5 .Nd close a dynamic library or bundle
   6 .Sh SYNOPSIS
   7 .In dlfcn.h
   8 .Ft int
   9 .Fn dlclose "void* handle"
  10 .Sh DESCRIPTION
  11 .Fn dlclose
  12 releases a reference to the dynamic library or bundle referenced by
  13 .Fa handle .
  14 If the reference count drops to 0, the bundle is removed from the
  15 address space, and
  16 .Fa handle
  17 is rendered invalid.
  18 Just before removing a dynamic library or bundle in this way, any
  19 termination routines in it are called.
  20 .Fa handle
  21 is the value returned by a previous call to dlopen.
  22 .Pp
  23 Prior to Mac OS X 10.5, only bundles could be unloaded.  Starting in Mac OS X 10.5,
  24 dynamic libraries may also be unloaded.  There are a couple of cases in which a
  25 dynamic library will never be unloaded: 1) the main executable links against it,
  26 2) an API that does not support unloading (e.g. NSAddImage()) was used to load
  27 it or some other dynamic library that depends on it, 3) the dynamic library
  28 is in dyld's shared cache.
  29 .Sh RETURN VALUES
  30 If
  31 .Fn dlclose
  32 is successful, it returns a value of 0.
  33 Otherwise it returns -1, and sets an error string that can be
  34 retrieved with
  35 .Fn dlerror .
  36 .Pp
  37 .Sh SEE ALSO
  38 .Xr dlopen 3
  39 .Xr dlsym 3
  40 .Xr dlerror 3
  41 .Xr dyld 3
  42 .Xr ld 1
  43 .Xr cc 1