minix/kernel/ipc.h

#ifndef IPC_H
#define IPC_H

/* This header file defines constants for MINIX inter-process communication.
 * These definitions are used in the file proc.c.
 */
#include <minix/com.h>

/* Masks and flags for system calls. */
#define NON_BLOCKING    0x0080  /* do not block if target not ready */

#define WILLRECEIVE(target, source_ep) \
  ((RTS_ISSET(target, RTS_RECEIVING) && !RTS_ISSET(target, RTS_SENDING)) &&	\
    (target->p_getfrom_e == ANY || target->p_getfrom_e == source_ep))

/* IPC status code macros. */
#define IPC_STATUS_REG		bx
#define IPC_STATUS_GET(p)	((p)->p_reg.IPC_STATUS_REG)
#define IPC_STATUS_SET(p, m)	((p)->p_reg.IPC_STATUS_REG = m)
#define IPC_STATUS_CLEAR(p)	IPC_STATUS_SET(p, 0)
#define IPC_STATUS_ADD(p, m)	((p)->p_reg.IPC_STATUS_REG |= m)

#endif /* IPC_H */
Reorganized system call library; uses separate file per call now. New configuration header file to include/ exclude functionality. Extracted privileged features from struct proc and create new struct priv. Renamed various system calls for readability. 2005-07-14 17:12:12 +02:00			`#ifndef IPC_H`
			`#define IPC_H`

Miscellaneous clean ups and fixes to the kernel. Support for FLOPPY in boot image. (Set controller=fd at boot monitor.) Moved major device numbers to <minix/dmap.h> (maybe rename to dev.h?) 2005-08-04 11:26:36 +02:00			`/* This header file defines constants for MINIX inter-process communication.`
			`* These definitions are used in the file proc.c.`
			`*/`
Kernel changes: - reinstalled priority changing, now in sched() and unready() - reinstalled check on message buffer in sys_call() - reinstalled check in send masks in sys_call() - changed do_fork() to get new privilege structure for SYS_PROCs - removed some processes from boot image---will be dynamically started later 2005-07-26 14:48:34 +02:00			`#include <minix/com.h>`

Created ECHO system call for testing purposes. Furthermore, a quick way to get one's own process number. 2005-05-27 15:57:00 +02:00			`/* Masks and flags for system calls. */`
Cleanup. 2007-04-23 15:44:56 +02:00			`#define NON_BLOCKING 0x0080 /* do not block if target not ready */`
Created ECHO system call for testing purposes. Furthermore, a quick way to get one's own process number. 2005-05-27 15:57:00 +02:00
Basic VM and other minor improvements. Not complete, probably not fully debugged or optimized. 2008-11-19 13:26:10 +01:00			`#define WILLRECEIVE(target, source_ep) \`
All macros defining rts flags are prefixed with RTS_ - macros used with RTS_SET group of macros to define struct proc p_rts_flags are now prefixed with RTS_ to make things clear 2009-11-10 10:11:13 +01:00			`((RTS_ISSET(target, RTS_RECEIVING) && !RTS_ISSET(target, RTS_SENDING)) && \`
Basic VM and other minor improvements. Not complete, probably not fully debugged or optimized. 2008-11-19 13:26:10 +01:00			`(target->p_getfrom_e == ANY \|\| target->p_getfrom_e == source_ep))`

IPC status code for receive(). IPC changes: - receive() is changed to take an additional parameter, which is a pointer to a status code. - The status code is filled in by the kernel to provide additional information to the caller. For now, the kernel only fills in the IPC call used by the sender. Syslib changes: - sef_receive() has been split into sef_receive() (with the original semantics) and sef_receive_status() which exposes the status code to userland. - Ideally, every sys process should gradually switch to sef_receive_status() and use is_ipc_notify() as a dependable way to check for notify. - SEF has been modified to use is_ipc_notify() and demonstrate how to use the new status code. 2010-03-23 01:09:11 +01:00			`/* IPC status code macros. */`
			`#define IPC_STATUS_REG bx`
			`#define IPC_STATUS_GET(p) ((p)->p_reg.IPC_STATUS_REG)`
			`#define IPC_STATUS_SET(p, m) ((p)->p_reg.IPC_STATUS_REG = m)`
			`#define IPC_STATUS_CLEAR(p) IPC_STATUS_SET(p, 0)`
			`#define IPC_STATUS_ADD(p, m) ((p)->p_reg.IPC_STATUS_REG \|= m)`
Basic VM and other minor improvements. Not complete, probably not fully debugged or optimized. 2008-11-19 13:26:10 +01:00
Reorganized system call library; uses separate file per call now. New configuration header file to include/ exclude functionality. Extracted privileged features from struct proc and create new struct priv. Renamed various system calls for readability. 2005-07-14 17:12:12 +02:00			`#endif /* IPC_H */`