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107 lines
3.1 KiB
107 lines
3.1 KiB
4 years ago
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/*
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* w32dll.h -- w32dll.c interface declaration
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* Written by Andrew Church <achurch@achurch.org>
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*
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* This file is part of transcode, a video stream processing tool.
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* transcode is free software, distributable under the terms of the GNU
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* General Public License (version 2 or later). See the file COPYING
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* for details.
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*/
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#ifndef W32DLL_H
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#define W32DLL_H
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/*************************************************************************/
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/* DLL handle type (opaque) */
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struct w32dllhandle_;
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typedef struct w32dllhandle_ *W32DLLHandle;
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/* WINAPI and CALLBACK calling format definitions, used by some DLLs. */
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#if defined(__GNUC__)
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# define WINAPI __attribute__((stdcall))
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#else
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# define WINAPI __stdcall
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#endif
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#define CALLBACK WINAPI
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/*************************************************************************/
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/**
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* w32dll_load: Load the given DLL file into memory, and return a handle
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* to it.
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*
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* Parameters:
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* path: DLL file pathname.
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* compat: If nonzero, adds a memory mapping for the entire DLL to
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* accommodate misbehaving DLLs that access memory outside the
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* registered sections.
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* Return value:
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* DLL handle (nonzero), or zero on error.
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* Side effects:
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* Sets errno to an appropriate value on error, including ENOEXEC if
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* the file is not recognized as a Win32 DLL file or is corrupt or
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* truncated, or ETXTBSY if the DLL's DllMain() function returns an
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* error. On successful return, errno is undefined.
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*/
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extern W32DLLHandle w32dll_load(const char *path, int compat);
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/**
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* w32dll_unload: Unload the given DLL from memory. Does nothing if the
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* given handle is zero.
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*
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* Parameters:
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* dll: DLL handle.
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* Return value:
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* None.
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*/
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extern void w32dll_unload(W32DLLHandle dll);
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/**
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* w32dll_lookup_by_name: Look up the address of an exported function in
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* the given DLL, using the function's name.
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*
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* Parameters:
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* dll: DLL handle.
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* name: Function name.
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* Return value:
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* Function address, or NULL on error.
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* Side effects:
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* Sets errno to one of the following values on error:
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* EINVAL: `dll' or `name' was invalid.
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* ENOENT: The requested function does not exist.
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* On successful return, errno is undefined.
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*/
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extern void *w32dll_lookup_by_name(W32DLLHandle dll, const char *name);
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/**
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* w32dll_lookup_by_ordinal: Look up the address of an exported function
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* in the given DLL, using the function's ordinal value.
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*
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* Parameters:
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* dll: DLL handle.
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* ordinal: Function ordinal.
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* Return value:
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* Function address, or NULL on error.
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* Side effects:
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* Sets errno to one of the following values on error:
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* EINVAL: `dll' was invalid.
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* ENOENT: The requested function does not exist.
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* On successful return, errno is undefined.
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*/
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extern void *w32dll_lookup_by_ordinal(W32DLLHandle dll, uint32_t ordinal);
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/*************************************************************************/
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#endif /* W32DLL_H */
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/*
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* Local variables:
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* c-file-style: "stroustrup"
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* c-file-offsets: ((case-label . *) (statement-case-intro . *))
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* indent-tabs-mode: nil
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* End:
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*
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* vim: expandtab shiftwidth=4:
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*/
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