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61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
/**
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* POSIX implementation of basic IO operations.
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*
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* Copyright (C) 2013, INRIA.
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*
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* This file subject to the terms and conditions of the GNU Lesser General
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* Public License. See the file LICENSE in the top level directory for more
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* details.
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*
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* @ingroup posix
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* @{
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* @file posix_io.c
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* @brief Implementation of basic POSIX IO functionality.
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* @author Kaspar Schleiser <kaspar@schleiser.de>
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* @}
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*/
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#include <thread.h>
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#include <msg.h>
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#include <posix_io.h>
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static int _posix_fileop(int pid, int op, int flags) {
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msg_t m;
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m.type = op;
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m.content.value = flags;
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msg_send_receive(&m, &m, pid);
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return m.content.value;
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}
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static int _posix_fileop_data(int pid, int op, char* buffer, int nbytes) {
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struct posix_iop_t r;
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r.nbytes = nbytes;
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r.buffer = buffer;
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msg_t m;
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m.type = op;
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m.content.ptr = (char*) &r;
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msg_send_receive(&m, &m, pid);
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return r.nbytes;
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}
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int posix_open(int pid, int flags) {
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return _posix_fileop(pid, OPEN, flags);
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}
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int posix_close(int pid) {
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return _posix_fileop(pid, CLOSE, 0);
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}
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int posix_read(int pid, char* buffer, int bufsize) {
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return _posix_fileop_data(pid, READ, buffer, bufsize);
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}
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int posix_write(int pid, char* buffer, int bufsize) {
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return _posix_fileop_data(pid, WRITE, buffer, bufsize);
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}
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