view dynload/dynload.3 @ 223:7076f551faf5

- dynload mach-o handling fixes for 64bit platforms - dynload test code improvements - dynload(3) clarification
author Tassilo Philipp
date Sat, 15 Apr 2017 15:21:37 +0200
parents 28bf0b231bce
children f8a6e60598cc
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.\" Copyright (c) 2007-2017 Daniel Adler <dadler AT uni-goettingen DOT de>, 
.\"                         Tassilo Philipp <tphilipp AT potion-studios DOT com>
.\" 
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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.\"
.Dd $Mdocdate$
.Dt dynload 3
.Sh NAME
.Nm dynload
.Nd encapsulates dynamic loading mechanisms and
gives access to functions in foreign dynamic libraries and code modules.
.Sh SYNOPSIS
.In dynload.h
.Ft DLLib *
.Fn dlLoadLibrary "const char * libpath"
.Ft void
.Fn dlFreeLibrary "DLLib * pLib"
.Ft void *
.Fn dlFindSymbol "DLLib * pLib" "const char * pSymbolName"
.Sh DESCRIPTION
The
.Nm
library provides an interface to load foreign dynamic libraries and access
to their symbols.
.Pp
.Fn dlLoadLibrary
loads a dynamic library at
.Ar libpath
and returns a handle to it for use in
.Fn dlFreeLibrary 
and
.Fn dlFindSymbol
calls. Passing a null pointer for the
.Ar libpath
argument is valid, and returns a handle to the main executable of the calling code. Returns a null pointer on error.
.Pp
.Fn dlFreeLibrary 
frees the loaded library with handle
.Ar pLib .
.Pp
.Fn dlFindSymbol
returns a pointer to a symbol with name
.Ar pSymbolName
in the library with handle
.Ar pLib ,
or returns a null pointer if the symbol cannot be found. The name is specified as it would appear in C source code (mangled if C++, etc.).
.Sh SEE ALSO
.Xr dyncall 3 ,
.Xr dyncallback 3
and the dyncall manual (available in HTML and PDF format) for more information.
.Sh AUTHORS
.An "Daniel Adler" Aq dadler@uni-goettingen.de
.An "Tassilo Philipp" Aq tphilipp@potion-studios.com