rt_benchs/communication_techniques/include/pipe_comm.h

61 lines
1.7 KiB
C

/*
* Copyright (C) 2009-2011 Thomas Preud'homme <thomas.preud-homme@lip6.fr>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _SPECIFIC_COMM_H_
#define _SPECIFIC_COMM_H_ 1
#include <unistd.h>
#define READ_IDX 0
#define WRITE_IDX 1
struct channel
{
int pipefd[2];
};
__BEGIN_DECLS
static inline void send(struct channel *channel, void **addr)
{
unsigned int nb_read;
void *addr_ptr;
nb_read = 0;
addr_ptr = &addr;
do
{
int n;
n = write(channel->pipefd[WRITE_IDX], addr_ptr, sizeof(void *) - nb_read);
if (n > 0)
{
nb_read += n;
addr_ptr = (void *) ((uintptr_t) addr_ptr + n);
}
} while (nb_read < sizeof(void *));
}
__END_DECLS
#endif