mirror of
https://github.com/genodelabs/genode.git
synced 2025-01-10 06:52:56 +00:00
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/*
|
|
* \brief File-operation utilities
|
|
* \author Christian Helmuth
|
|
* \author Emery Hemingway
|
|
* \date 2015-06-30
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2015-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef _LIBC_FILE_H_
|
|
#define _LIBC_FILE_H_
|
|
|
|
/* Genode includes */
|
|
#include <base/log.h>
|
|
|
|
/* Genode-specific libc interfaces */
|
|
#include <libc-plugin/fd_alloc.h>
|
|
#include <libc-plugin/plugin_registry.h>
|
|
|
|
|
|
enum { INVALID_FD = -1 };
|
|
|
|
/**
|
|
* Find plugin responsible for the specified libc file descriptor
|
|
*
|
|
* \param func_name function name of the caller for printing an error message
|
|
*/
|
|
static inline Libc::File_descriptor *libc_fd_to_fd(int libc_fd, const char *func_name)
|
|
{
|
|
Libc::File_descriptor *fd =
|
|
Libc::file_descriptor_allocator()->find_by_libc_fd(libc_fd);
|
|
if (!fd)
|
|
Genode::error("no plugin found for ", func_name, "(", libc_fd, ")");
|
|
return fd;
|
|
}
|
|
|
|
|
|
/**
|
|
* Generate body of wrapper function taking a file descriptor as first argument
|
|
*/
|
|
#define FD_FUNC_WRAPPER_GENERIC(result_stm, result_err_val, func_name, libc_fd, ...) \
|
|
{ \
|
|
File_descriptor *fd = libc_fd_to_fd(libc_fd, #func_name); \
|
|
if (!fd || !fd->plugin) { \
|
|
errno = EBADF; \
|
|
result_stm result_err_val; \
|
|
} else \
|
|
result_stm fd->plugin->func_name(fd, ##__VA_ARGS__ ); \
|
|
}
|
|
|
|
#define FD_FUNC_WRAPPER(func_name, libc_fd, ...) \
|
|
FD_FUNC_WRAPPER_GENERIC(return, INVALID_FD, func_name, libc_fd, ##__VA_ARGS__ )
|
|
|
|
/**
|
|
* Generate body of wrapper function taking a path name as first argument
|
|
*/
|
|
#define FNAME_FUNC_WRAPPER_GENERIC(result_stm, func_name, path, ...) \
|
|
{ \
|
|
Plugin *plugin = plugin_registry()->get_plugin_for_##func_name(path, ##__VA_ARGS__); \
|
|
if (!plugin) { \
|
|
Genode::error("no plugin found for ", #func_name, "(\"", Genode::Cstring(path), "\")");\
|
|
errno = ENOSYS; \
|
|
result_stm -1; \
|
|
} else \
|
|
result_stm plugin->func_name(path, ##__VA_ARGS__); \
|
|
}
|
|
|
|
#define FNAME_FUNC_WRAPPER(func_name, path, ...) \
|
|
FNAME_FUNC_WRAPPER_GENERIC(return, func_name, path, ##__VA_ARGS__ )
|
|
|
|
#endif /* _LIBC_FILE_H_ */
|