From 54156a3d9a2a7f87591e5efd37a8fe6f708b933f Mon Sep 17 00:00:00 2001 From: Dimitri Staessens Date: Sat, 18 Mar 2023 21:02:10 +0100 Subject: irmd: Move registry objects to their own sources Rename internal data structures so it's clear that they are the IRMd representation of these objects for management purposes. Split functionality for these objects off and and move them to their own source files. Rename internal functions of the IRMd to reflect this, with some small refactoring. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders --- src/irmd/reg/proc.c | 265 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 265 insertions(+) create mode 100644 src/irmd/reg/proc.c (limited to 'src/irmd/reg/proc.c') diff --git a/src/irmd/reg/proc.c b/src/irmd/reg/proc.c new file mode 100644 index 00000000..1aae789d --- /dev/null +++ b/src/irmd/reg/proc.c @@ -0,0 +1,265 @@ +/* + * Ouroboros - Copyright (C) 2016 - 2023 + * + * The IPC Resource Manager - Registry - Processes + * + * Dimitri Staessens + * Sander Vrijders + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., http://www.fsf.org/about/contact/. + */ + +#if defined(__linux__) || defined(__CYGWIN__) +#define _DEFAULT_SOURCE +#else +#define _POSIX_C_SOURCE 200112L +#endif + +#include "config.h" + +#include +#include +#include + +#include "proc.h" +#include "name.h" + +#include +#include +#include +#include + +struct reg_proc * reg_proc_create(pid_t pid, + const char * prog) +{ + struct reg_proc * proc; + pthread_condattr_t cattr; + + assert(prog); + + proc = malloc(sizeof(*proc)); + if (proc == NULL) + goto fail_malloc; + + if (pthread_condattr_init(&cattr)) + goto fail_condattr; + +#ifndef __APPLE__ + pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK); +#endif + + if (pthread_mutex_init(&proc->lock, NULL)) + goto fail_mutex; + + if (pthread_cond_init(&proc->cond, &cattr)) + goto fail_cond; + + proc->set = shm_flow_set_create(pid); + if (proc->set == NULL) + goto fail_set; + + proc->prog = strdup(prog); + if(proc->prog == NULL) + goto fail_prog; + + list_head_init(&proc->next); + list_head_init(&proc->names); + + proc->pid = pid; + proc->name = NULL; + proc->state = PROC_INIT; + + return proc; + + fail_prog: + shm_flow_set_destroy(proc->set); + fail_set: + pthread_cond_destroy(&proc->cond);; + fail_cond: + pthread_mutex_destroy(&proc->lock); + fail_mutex: + pthread_condattr_destroy(&cattr); + fail_condattr: + free(proc); + fail_malloc: + return NULL; +} + +static void cancel_reg_proc(void * o) +{ + struct reg_proc * proc = (struct reg_proc *) o; + + proc->state = PROC_NULL; + + pthread_mutex_unlock(&proc->lock); +} + +void reg_proc_destroy(struct reg_proc * proc) +{ + struct list_head * p; + struct list_head * h; + + assert(proc); + + pthread_mutex_lock(&proc->lock); + + if (proc->state == PROC_DESTROY) { + pthread_mutex_unlock(&proc->lock); + return; + } + + if (proc->state == PROC_SLEEP) + proc->state = PROC_DESTROY; + + pthread_cond_signal(&proc->cond); + + pthread_cleanup_push(cancel_reg_proc, proc); + + while (proc->state != PROC_INIT) + pthread_cond_wait(&proc->cond, &proc->lock); + + pthread_cleanup_pop(false); + + pthread_mutex_unlock(&proc->lock); + + shm_flow_set_destroy(proc->set); + + pthread_cond_destroy(&proc->cond); + pthread_mutex_destroy(&proc->lock); + + list_for_each_safe(p, h, &proc->names) { + struct str_el * n = list_entry(p, struct str_el, next); + list_del(&n->next); + if (n->str != NULL) + free(n->str); + free(n); + } + + free(proc->prog); + free(proc); +} + +int reg_proc_add_name(struct reg_proc * proc, + const char * name) +{ + struct str_el * s; + + assert(proc); + assert(name); + + s = malloc(sizeof(*s)); + if (s == NULL) + goto fail_malloc; + + s->str = strdup(name); + if (s->str == NULL) + goto fail_name; + + list_add(&s->next, &proc->names); + + return 0; + + fail_name: + free(s); + fail_malloc: + return -ENOMEM; +} + +void reg_proc_del_name(struct reg_proc * proc, + const char * name) +{ + struct list_head * p = NULL; + struct list_head * h = NULL; + + assert(proc); + assert(name); + + list_for_each_safe(p, h, &proc->names) { + struct str_el * s = list_entry(p, struct str_el, next); + if (!strcmp(name, s->str)) { + list_del(&s->next); + free(s->str); + free(s); + } + } +} + +int reg_proc_sleep(struct reg_proc * proc, + struct timespec * dl) +{ + + int ret = 0; + + assert(proc); + + pthread_mutex_lock(&proc->lock); + + if (proc->state != PROC_WAKE && proc->state != PROC_DESTROY) + proc->state = PROC_SLEEP; + + pthread_cleanup_push(cancel_reg_proc, proc); + + while (proc->state == PROC_SLEEP && ret != -ETIMEDOUT) + if (dl != NULL) + ret = -pthread_cond_timedwait(&proc->cond, + &proc->lock, dl); + else + ret = -pthread_cond_wait(&proc->cond, &proc->lock); + + pthread_cleanup_pop(false); + + if (proc->state == PROC_DESTROY) { + if (proc->name != NULL) + reg_name_del_pid(proc->name, proc->pid); + ret = -1; + } + + proc->state = PROC_INIT; + + pthread_cond_broadcast(&proc->cond); + pthread_mutex_unlock(&proc->lock); + + return ret; +} + +void reg_proc_wake(struct reg_proc * proc, + struct reg_name * name) +{ + assert(proc); + assert(name); + + pthread_mutex_lock(&proc->lock); + + if (proc->state != PROC_SLEEP) { + pthread_mutex_unlock(&proc->lock); + return; + } + + proc->state = PROC_WAKE; + proc->name = name; + + pthread_cond_broadcast(&proc->cond); + + pthread_cleanup_push(cancel_reg_proc, proc); + + while (proc->state == PROC_WAKE) + pthread_cond_wait(&proc->cond, &proc->lock); + + pthread_cleanup_pop(false); + + if (proc->state == PROC_DESTROY) + proc->state = PROC_INIT; + + pthread_mutex_unlock(&proc->lock); +} -- cgit v1.2.3