| [449] | 1 | /* |
|---|
| 2 | * signal.c - User side signals related syscalls implementation. |
|---|
| 3 | * |
|---|
| 4 | * Author Alain Greiner (2016,2017,2018) |
|---|
| 5 | * |
|---|
| 6 | * Copyright (c) UPMC Sorbonne Universites |
|---|
| 7 | * |
|---|
| 8 | * This file is part of ALMOS-MKH. |
|---|
| 9 | * |
|---|
| 10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
|---|
| 11 | * under the terms of the GNU General Public License as published by |
|---|
| 12 | * the Free Software Foundation; version 2.0 of the License. |
|---|
| 13 | * |
|---|
| 14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
|---|
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
|---|
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|---|
| 17 | * General Public License for more details. |
|---|
| 18 | * |
|---|
| 19 | * You should have received a copy of the GNU General Public License |
|---|
| 20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
|---|
| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
|---|
| 22 | */ |
|---|
| 23 | #ifndef _SIGNAL_H_ |
|---|
| 24 | #define _SIGNAL_H_ |
|---|
| 25 | |
|---|
| 26 | /***************************************************************************************** |
|---|
| 27 | * This file defines the user side, signals related library. |
|---|
| 28 | * All these functions make a system call to access the kernel VFS. |
|---|
| 29 | * The user/kernel shared structures and mnemonics are defined in |
|---|
| 30 | * the <syscalls/shared_include/shared_signal.h> file. |
|---|
| 31 | ****************************************************************************************/ |
|---|
| 32 | |
|---|
| 33 | #include <shared_signal.h> |
|---|
| 34 | |
|---|
| 35 | /***************************************************************************************** |
|---|
| 36 | * This function associate a specific signal handler to a given signal type. |
|---|
| 37 | * The handlers for the SIGKILL and SIGSTOP signals cannot be redefined. |
|---|
| 38 | ***************************************************************************************** |
|---|
| 39 | * @ sig_id : index defining signal type (from 1 to 31). |
|---|
| 40 | * @ handler : pointer on fonction implementing the specific handler. |
|---|
| 41 | * @ return 0 if success / returns -1 if failure. |
|---|
| 42 | ****************************************************************************************/ |
|---|
| 43 | int signal( unsigned int sig_id, |
|---|
| 44 | void * handler ); |
|---|
| 45 | |
|---|
| 46 | /***************************************************************************************** |
|---|
| 47 | * This function implements the "kill" system call on the user side. |
|---|
| 48 | * It register the signal defined by the <sig_id> argument in all thread descriptors |
|---|
| 49 | * of a target process identified by the <pid> argument. This is done in all clusters |
|---|
| 50 | * containing threads for the target process. |
|---|
| 51 | * It can be executed by any thread running in any cluster, as this function uses |
|---|
| 52 | * remote access to traverse the list of process copies stored in the owner cluster, |
|---|
| 53 | * and the RPC_SIGNAL_RISE to signal the remote threads. |
|---|
| 54 | * This function does nothing for (sig_id == 0). This can be used to check process pid. |
|---|
| 55 | * TODO : This first implementation supports only SIGKILL / SIGSTOP / SIGCONT values. |
|---|
| 56 | ***************************************************************************************** |
|---|
| 57 | * @ pid : target process identifier. |
|---|
| 58 | * @ sig_id : index defining the signal type. |
|---|
| 59 | * @ return 0 if success / returns -1 if failure. |
|---|
| 60 | ****************************************************************************************/ |
|---|
| 61 | int kill( unsigned int pid, |
|---|
| 62 | unsigned int sig_id ); |
|---|
| 63 | |
|---|
| 64 | #endif |
|---|
