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-rw-r--r--src/irmd/proc_table.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/src/irmd/proc_table.c b/src/irmd/proc_table.c
new file mode 100644
index 00000000..76fd5864
--- /dev/null
+++ b/src/irmd/proc_table.c
@@ -0,0 +1,295 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * The IPC Resource Manager - Process Table
+ *
+ * Dimitri Staessens <dimitri.staessens@ugent.be>
+ * Sander Vrijders <sander.vrijders@ugent.be>
+ *
+ * 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/.
+ */
+
+#define _POSIX_C_SOURCE 200112L
+
+#include "config.h"
+
+#include <ouroboros/list.h>
+#include <ouroboros/errno.h>
+#include <ouroboros/time_utils.h>
+
+#include "proc_table.h"
+#include "registry.h"
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+#include <assert.h>
+
+struct proc_entry * proc_entry_create(pid_t pid,
+ char * prog)
+{
+ struct proc_entry * e;
+ pthread_condattr_t cattr;
+
+ assert(prog);
+
+ e = malloc(sizeof(*e));
+ if (e == NULL)
+ return NULL;
+
+ list_head_init(&e->next);
+ list_head_init(&e->names);
+
+ e->pid = pid;
+ e->prog = prog;
+ e->daf_name = NULL;
+
+ e->re = NULL;
+
+ e->state = PROC_INIT;
+
+ if (pthread_condattr_init(&cattr)) {
+ free(e);
+ return NULL;
+ }
+
+#ifndef __APPLE__
+ pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
+#endif
+
+ if (pthread_mutex_init(&e->lock, NULL)) {
+ free(e);
+ return NULL;
+ }
+
+
+ if (pthread_cond_init(&e->cond, &cattr)) {
+ pthread_mutex_destroy(&e->lock);
+ free(e);
+ return NULL;
+ }
+
+ return e;
+}
+
+static void cancel_proc_entry(void * o)
+{
+ struct proc_entry * e = (struct proc_entry *) o;
+
+ e->state = PROC_NULL;
+
+ pthread_mutex_unlock(&e->lock);
+}
+
+void proc_entry_destroy(struct proc_entry * e)
+{
+ struct list_head * p;
+ struct list_head * h;
+
+ assert(e);
+
+ pthread_mutex_lock(&e->lock);
+
+ if (e->state == PROC_DESTROY) {
+ pthread_mutex_unlock(&e->lock);
+ return;
+ }
+
+ if (e->state == PROC_SLEEP)
+ e->state = PROC_DESTROY;
+
+ pthread_cond_signal(&e->cond);
+
+ pthread_cleanup_push(cancel_proc_entry, e);
+
+ while (e->state != PROC_INIT)
+ pthread_cond_wait(&e->cond, &e->lock);
+
+ pthread_cleanup_pop(false);
+
+ pthread_mutex_unlock(&e->lock);
+
+ pthread_cond_destroy(&e->cond);
+ pthread_mutex_destroy(&e->lock);
+
+ if (e->prog != NULL)
+ free(e->prog);
+
+ list_for_each_safe(p, h, &e->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(e);
+}
+
+int proc_entry_add_name(struct proc_entry * e,
+ char * name)
+{
+ struct str_el * s;
+
+ assert(e);
+ assert(name);
+
+ s = malloc(sizeof(*s));
+ if (s == NULL)
+ return -ENOMEM;
+
+ s->str = name;
+ list_add(&s->next, &e->names);
+
+ return 0;
+}
+
+void proc_entry_del_name(struct proc_entry * e,
+ const char * name)
+{
+ struct list_head * p = NULL;
+ struct list_head * h = NULL;
+
+ assert(e);
+ assert(name);
+
+ list_for_each_safe(p, h, &e->names) {
+ struct str_el * s = list_entry(p, struct str_el, next);
+ if (!wildcard_match(name, s->str)) {
+ list_del(&s->next);
+ if (s->str != NULL)
+ free(s->str);
+ free(s);
+ }
+ }
+}
+
+int proc_entry_sleep(struct proc_entry * e,
+ struct timespec * timeo)
+{
+ struct timespec dl;
+
+ int ret = 0;
+
+ assert(e);
+
+ if (timeo != NULL) {
+ clock_gettime(PTHREAD_COND_CLOCK, &dl);
+ ts_add(&dl, timeo, &dl);
+ }
+
+ pthread_mutex_lock(&e->lock);
+
+ if (e->state != PROC_WAKE && e->state != PROC_DESTROY)
+ e->state = PROC_SLEEP;
+
+ pthread_cleanup_push(cancel_proc_entry, e);
+
+ while (e->state == PROC_SLEEP && ret != -ETIMEDOUT)
+ if (timeo)
+ ret = -pthread_cond_timedwait(&e->cond, &e->lock, &dl);
+ else
+ ret = -pthread_cond_wait(&e->cond, &e->lock);
+
+ pthread_cleanup_pop(false);
+
+ if (e->state == PROC_DESTROY) {
+ if (e->re != NULL)
+ reg_entry_del_pid(e->re, e->pid);
+ ret = -1;
+ }
+
+ e->state = PROC_INIT;
+
+ pthread_cond_broadcast(&e->cond);
+ pthread_mutex_unlock(&e->lock);
+
+ return ret;
+}
+
+void proc_entry_wake(struct proc_entry * e,
+ struct reg_entry * re)
+{
+ assert(e);
+ assert(re);
+
+ pthread_mutex_lock(&e->lock);
+
+ if (e->state != PROC_SLEEP) {
+ pthread_mutex_unlock(&e->lock);
+ return;
+ }
+
+ e->state = PROC_WAKE;
+ e->re = re;
+
+ pthread_cond_broadcast(&e->cond);
+
+ pthread_cleanup_push(cancel_proc_entry, e);
+
+ while (e->state == PROC_WAKE)
+ pthread_cond_wait(&e->cond, &e->lock);
+
+ pthread_cleanup_pop(false);
+
+ if (e->state == PROC_DESTROY)
+ e->state = PROC_INIT;
+
+ pthread_mutex_unlock(&e->lock);
+}
+
+int proc_table_add(struct list_head * proc_table,
+ struct proc_entry * e)
+{
+
+ assert(proc_table);
+ assert(e);
+
+ list_add(&e->next, proc_table);
+
+ return 0;
+}
+
+void proc_table_del(struct list_head * proc_table,
+ pid_t pid)
+{
+ struct list_head * p;
+ struct list_head * h;
+
+ assert(proc_table);
+
+ list_for_each_safe(p, h, proc_table) {
+ struct proc_entry * e = list_entry(p, struct proc_entry, next);
+ if (pid == e->pid) {
+ list_del(&e->next);
+ proc_entry_destroy(e);
+ }
+ }
+}
+
+struct proc_entry * proc_table_get(struct list_head * proc_table,
+ pid_t pid)
+{
+ struct list_head * h;
+
+ assert(proc_table);
+
+ list_for_each(h, proc_table) {
+ struct proc_entry * e = list_entry(h, struct proc_entry, next);
+ if (pid == e->pid)
+ return e;
+ }
+
+ return NULL;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-11 03:14:09 +0000