| 1 | /* |
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| 2 | * kern/sys_getpid.c - Kernel function implementing the "get_pid" system call. |
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| 3 | * |
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| 4 | * Author Alain Greiner (2016,2017, 2018) |
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| 5 | * |
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| 6 | * Copyright (c) UPMC Sorbonne Universites |
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| 7 | * |
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| 8 | * This file is part of ALMOS-MKH. |
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| 9 | * |
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| 10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 11 | * under the terms of the GNU General Public License as published by |
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| 12 | * the Free Software Foundation; version 2.0 of the License. |
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| 13 | * |
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| 14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 17 | * General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 22 | */ |
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| 23 | |
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| 24 | #include <thread.h> |
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| 25 | #include <process.h> |
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| 26 | #include <syscalls.h> |
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| 27 | |
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| 28 | ////////////////////// |
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| 29 | int sys_getpid( void ) |
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| 30 | { |
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| 31 | thread_t * this = CURRENT_THREAD; |
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| 32 | process_t * process = this->process; |
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| 33 | |
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| 34 | #if (DEBUG_SYS_GETPID || CONFIG_INSTRUMENTATION_SYSCALLS) |
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| 35 | uint64_t tm_start = hal_get_cycles(); |
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| 36 | #endif |
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| 37 | |
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| 38 | #if DEBUG_SYS_GETPID |
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| 39 | tm_start = hal_get_cycles(); |
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| 40 | if( DEBUG_SYS_FG < tm_start ) |
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| 41 | printk("\n[DBG] %s : thread %x in process %x enter / cycle %d\n", |
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| 42 | __FUNCTION__ , this->trdid , process->pid, (uint32_t)tm_start ); |
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| 43 | #endif |
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| 44 | |
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| 45 | // get pid value from local process descriptor |
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| 46 | pid_t pid = process->pid; |
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| 47 | |
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| 48 | #if (DEBUG_SYS_GETPID || CONFIG_INSTRUMENTATION_SYSCALLS) |
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| 49 | uint64_t tm_end = hal_get_cycles(); |
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| 50 | #endif |
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| 51 | |
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| 52 | #if DEBUG_SYS_GETPID |
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| 53 | tm_end = hal_get_cycles(); |
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| 54 | if( DEBUG_SYS_GETPID < tm_end ) |
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| 55 | printk("\n[DBG] %s : thread %x in process %x exit / cycle %d\n", |
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| 56 | __FUNCTION__, this->trdid, process->pid, (uint32_t)tm_end ); |
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| 57 | #endif |
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| 58 | |
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| 59 | #if CONFIG_INSTRUMENTATION_SYSCALLS |
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| 60 | hal_atomic_add( &syscalls_cumul_cost[SYS_GETPID] , tm_end - tm_start ); |
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| 61 | hal_atomic_add( &syscalls_occurences[SYS_GETPID] , 1 ); |
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| 62 | #endif |
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| 63 | |
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| 64 | return pid; |
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| 65 | |
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| 66 | } // end sys_getpid() |
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