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/flow.c | 222 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 222 insertions(+) create mode 100644 src/irmd/reg/flow.c (limited to 'src/irmd/reg/flow.c') diff --git a/src/irmd/reg/flow.c b/src/irmd/reg/flow.c new file mode 100644 index 00000000..30b9c504 --- /dev/null +++ b/src/irmd/reg/flow.c @@ -0,0 +1,222 @@ +/* + * Ouroboros - Copyright (C) 2016 - 2023 + * + * The IPC Resource Manager - Registry - Flows + * + * 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/. + */ + +#define _POSIX_C_SOURCE 200112L + +#include "config.h" + +#define OUROBOROS_PREFIX "reg-flow" + +#include +#include +#include +#include + +#include "flow.h" + +#include +#include +#include +#include + +struct reg_flow * reg_flow_create(pid_t n_pid, + pid_t n_1_pid, + int flow_id, + qosspec_t qs) +{ + pthread_condattr_t cattr; + struct reg_flow * f; + + f = malloc(sizeof(*f)); + if (f == NULL) + goto fail_malloc; + + memset(f, 0, sizeof(*f)); + + if (pthread_condattr_init(&cattr)) + goto fail_cattr; + +#ifndef __APPLE__ + pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK); +#endif + if (pthread_cond_init(&f->cond, &cattr)) + goto fail_cond; + + if (pthread_mutex_init(&f->mtx, NULL)) + goto fail_mutex; + + f->n_rb = shm_rbuff_create(n_pid, flow_id); + if (f->n_rb == NULL) { + log_err("Could not create ringbuffer for process %d.", n_pid); + goto fail_n_rbuff; + } + + f->n_1_rb = shm_rbuff_create(n_1_pid, flow_id); + if (f->n_1_rb == NULL) { + log_err("Could not create ringbuffer for process %d.", n_1_pid); + goto fail_n_1_rbuff; + } + + if (clock_gettime(CLOCK_MONOTONIC, &f->t0) < 0) + log_warn("Failed to set timestamp."); + + pthread_condattr_destroy(&cattr); + + f->n_pid = n_pid; + f->n_1_pid = n_1_pid; + f->flow_id = flow_id; + f->qs = qs; + + f->state = FLOW_ALLOC_PENDING; + + return f; + + fail_n_1_rbuff: + shm_rbuff_destroy(f->n_rb); + fail_n_rbuff: + pthread_mutex_destroy(&f->mtx); + fail_mutex: + pthread_cond_destroy(&f->cond); + fail_cond: + pthread_condattr_destroy(&cattr); + fail_cattr: + free(f); + fail_malloc: + return NULL; +} + +static void cancel_irm_destroy(void * o) +{ + struct reg_flow * f = (struct reg_flow *) o; + + pthread_mutex_unlock(&f->mtx); + + pthread_cond_destroy(&f->cond); + pthread_mutex_destroy(&f->mtx); + + shm_rbuff_destroy(f->n_rb); + shm_rbuff_destroy(f->n_1_rb); + + free(f); +} + +void reg_flow_destroy(struct reg_flow * f) +{ + assert(f); + + pthread_mutex_lock(&f->mtx); + + assert(f->data.len == 0); + + if (f->state == FLOW_DESTROY) { + pthread_mutex_unlock(&f->mtx); + return; + } + + if (f->state == FLOW_ALLOC_PENDING) + f->state = FLOW_DESTROY; + else + f->state = FLOW_NULL; + + pthread_cond_broadcast(&f->cond); + + pthread_cleanup_push(cancel_irm_destroy, f); + + while (f->state != FLOW_NULL) + pthread_cond_wait(&f->cond, &f->mtx); + + pthread_cleanup_pop(true); +} + +enum flow_state reg_flow_get_state(struct reg_flow * f) +{ + enum flow_state state; + + assert(f); + + pthread_mutex_lock(&f->mtx); + + state = f->state; + + pthread_mutex_unlock(&f->mtx); + + return state; +} + +void reg_flow_set_state(struct reg_flow * f, + enum flow_state state) +{ + assert(f); + assert(state != FLOW_DESTROY); + + pthread_mutex_lock(&f->mtx); + + f->state = state; + pthread_cond_broadcast(&f->cond); + + pthread_mutex_unlock(&f->mtx); +} + +int reg_flow_wait_state(struct reg_flow * f, + enum flow_state state, + struct timespec * dl) +{ + int ret = 0; + int s; + + assert(f); + assert(state != FLOW_NULL); + assert(state != FLOW_DESTROY); + assert(state != FLOW_DEALLOC_PENDING); + + pthread_mutex_lock(&f->mtx); + + assert(f->state != FLOW_NULL); + + pthread_cleanup_push(__cleanup_mutex_unlock, &f->mtx); + + while (!(f->state == state || + f->state == FLOW_DESTROY || + f->state == FLOW_DEALLOC_PENDING) && + ret != -ETIMEDOUT) { + if (dl != NULL) + ret = -pthread_cond_timedwait(&f->cond, + &f->mtx, + dl); + else + ret = -pthread_cond_wait(&f->cond, + &f->mtx); + } + + if (f->state == FLOW_DESTROY || + f->state == FLOW_DEALLOC_PENDING || + ret == -ETIMEDOUT) { + f->state = FLOW_NULL; + pthread_cond_broadcast(&f->cond); + } + + s = f->state; + + pthread_cleanup_pop(true); + + return ret ? ret : s; +} -- cgit v1.2.3