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-rw-r--r--src/irmd/reg/proc.c265
1 files changed, 265 insertions, 0 deletions
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 <dimitri@ouroboros.rocks>
+ * Sander Vrijders <sander@ouroboros.rocks>
+ *
+ * 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 <ouroboros/list.h>
+#include <ouroboros/errno.h>
+#include <ouroboros/time_utils.h>
+
+#include "proc.h"
+#include "name.h"
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+#include <assert.h>
+
+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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-15 04:34:48 +0000