libphobos/libdruntime/core/sys/netbsd/dlfcn.d

   1 /**
   2  * D header file for NetBSD.
   3  *
   4  * Copyright: Copyright Martin Nowak 2012.
   5  * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
   6  * Authors:   Martin Nowak
   7  *
   8  * http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/include/dlfcn.h
   9  */
  10 module core.sys.netbsd.dlfcn;
  11
  12 public import core.sys.posix.dlfcn;
  13
  14 version (NetBSD):
  15 extern (C):
  16 nothrow:
  17 @nogc:
  18
  19 enum __BSD_VISIBLE = true;
  20
  21 /*
  22  * Request arguments for dlinfo().
  23  */
  24 enum RTLD_DI_LINKMAP     = 3;    /* Obtain link map. */
  25 enum RTLD_DI_SERINFO     = 5;    /* Obtain search path info. */
  26 enum RTLD_DI_SERINFOSIZE = 6;    /*  ... query for required space. */
  27 enum RTLD_DI_ORIGIN      = 7;    /* Obtain object origin */
  28 enum RTLD_DI_MAX         = RTLD_DI_ORIGIN;
  29
  30 /*
  31  * Special handle arguments for dlsym()/dlinfo().
  32  */
  33 enum RTLD_NEXT    = cast(void *)-1;    /* Search subsequent objects. */
  34 enum RTLD_DEFAULT = cast(void *)-2;    /* Use default search algorithm. */
  35 enum RTLD_SELF    = cast(void *)-3;    /* Search the caller itself. */
  36
  37 static if (__BSD_VISIBLE)
  38 {
  39     /*-
  40      * The actual type declared by this typedef is immaterial, provided that
  41      * it is a function pointer.  Its purpose is to provide a return type for
  42      * dlfunc() which can be cast to a function pointer type without depending
  43      * on behavior undefined by the C standard, which might trigger a compiler
  44      * diagnostic.  We intentionally declare a unique type signature to force
  45      * a diagnostic should the application not cast the return value of dlfunc()
  46      * appropriately.
  47      */
  48     struct __dlfunc_arg {
  49         int     __dlfunc_dummy;
  50     }
  51
  52     alias dlfunc_t = void function(__dlfunc_arg);
  53
  54     /*
  55      * Structures, returned by the RTLD_DI_SERINFO dlinfo() request.
  56      */
  57     struct Dl_serpath {
  58         char *          dls_name;       /* single search path entry */
  59         uint            dls_flags;      /* path information */
  60     }
  61
  62     struct Dl_serinfo {
  63         size_t          dls_size;       /* total buffer size */
  64         uint            dls_cnt;        /* number of path entries */
  65         Dl_serpath[1]   dls_serpath;    /* there may be more than one */
  66     }
  67 }
  68
  69 /* XSI functions first. */
  70 extern(C) {
  71     static assert(is(typeof(&dlclose) == int function(void*)));
  72     static assert(is(typeof(&dlerror) == char* function()));
  73     static assert(is(typeof(&dlopen)  == void* function(const scope char*, int)));
  74     static assert(is(typeof(&dlsym)   == void* function(void*, const scope char*)));
  75 }
  76
  77 static if (__BSD_VISIBLE)
  78 {
  79     int      dlinfo(void*, int, void*);
  80     void*    dlvsym(void*, const(char)*, const(char)*);
  81 }