summaryrefslogtreecommitdiff
path: root/src/lib/cdap.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/lib/cdap.c')
-rw-r--r--src/lib/cdap.c868
1 files changed, 0 insertions, 868 deletions
diff --git a/src/lib/cdap.c b/src/lib/cdap.c
deleted file mode 100644
index d9cb2036..00000000
--- a/src/lib/cdap.c
+++ /dev/null
@@ -1,868 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016 - 2017
- *
- * The Common Distributed Application Protocol
- *
- * Dimitri Staessens <dimitri.staessens@ugent.be>
- * Sander Vrijders <sander.vrijders@ugent.be>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public License
- * version 2.1 as published by the Free Software Foundation.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., http://www.fsf.org/about/contact/.
- */
-
-#define _POSIX_C_SOURCE 200809L
-
-#include <ouroboros/cdap.h>
-#include <ouroboros/bitmap.h>
-#include <ouroboros/dev.h>
-#include <ouroboros/fqueue.h>
-#include <ouroboros/errno.h>
-
-#include "cdap_req.h"
-
-#include <stdlib.h>
-#include <pthread.h>
-#include <string.h>
-#include <assert.h>
-
-#include "cdap.pb-c.h"
-typedef Cdap cdap_t;
-
-#define CDAP_REPLY (CDAP_DELETE + 1)
-
-#define INVALID_ID -1
-#define IDS_SIZE 2048
-#define BUF_SIZE 2048
-
-struct fd_el {
- struct list_head next;
-
- int fd;
-};
-
-struct cdap {
- fset_t * set;
- fqueue_t * fq;
-
- bool proc;
- pthread_mutex_t mtx;
- pthread_cond_t cond;
-
- size_t n_flows;
- struct list_head flows;
- pthread_rwlock_t flows_lock;
-
- struct bmp * ids;
- pthread_mutex_t ids_lock;
-
- struct list_head sent;
- pthread_rwlock_t sent_lock;
-
- struct list_head rcvd;
- pthread_cond_t rcvd_cond;
- pthread_mutex_t rcvd_lock;
-
- pthread_t reader;
-};
-
-struct cdap_rcvd {
- struct list_head next;
-
- int fd;
- bool proc;
-
- invoke_id_t iid;
- cdap_key_t key;
-
- enum cdap_opcode opcode;
- char * name;
- void * data;
- size_t len;
- uint32_t flags;
-};
-
-static int next_id(struct cdap * instance)
-{
- int ret;
-
- assert(instance);
-
- pthread_mutex_lock(&instance->ids_lock);
-
- ret = bmp_allocate(instance->ids);
- if (!bmp_is_id_valid(instance->ids, ret))
- ret = INVALID_ID;
-
- pthread_mutex_unlock(&instance->ids_lock);
-
- return ret;
-}
-
-static int release_id(struct cdap * instance,
- int32_t id)
-{
- int ret;
-
- assert(instance);
-
- pthread_mutex_lock(&instance->ids_lock);
-
- ret = bmp_release(instance->ids, id);
-
- pthread_mutex_unlock(&instance->ids_lock);
-
- return ret;
-}
-
-#define cdap_sent_has_key(i, key) (cdap_sent_get_by_key(i, key) != NULL)
-
-static struct cdap_req * cdap_sent_get_by_key(struct cdap * instance,
- cdap_key_t key)
-{
- struct list_head * p = NULL;
- struct cdap_req * req = NULL;
-
- assert(instance);
-
- pthread_rwlock_rdlock(&instance->sent_lock);
-
- list_for_each(p, &instance->sent) {
- req = list_entry(p, struct cdap_req, next);
- if (req->key == key) {
- pthread_rwlock_unlock(&instance->sent_lock);
- return req;
- }
- }
-
- pthread_rwlock_unlock(&instance->sent_lock);
-
- return NULL;
-}
-
-static struct cdap_req * cdap_sent_get_by_iid(struct cdap * instance,
- invoke_id_t iid)
-{
- struct list_head * p = NULL;
- struct cdap_req * req = NULL;
-
- assert(instance);
-
- pthread_rwlock_rdlock(&instance->sent_lock);
-
- list_for_each(p, &instance->sent) {
- req = list_entry(p, struct cdap_req, next);
- if (req->iid == iid) {
- pthread_rwlock_unlock(&instance->sent_lock);
- return req;
- }
- }
-
- pthread_rwlock_unlock(&instance->sent_lock);
-
- return NULL;
-}
-
-static struct cdap_rcvd * cdap_rcvd_get_by_key(struct cdap * instance,
- cdap_key_t key)
-{
- struct list_head * p = NULL;
- struct list_head * h = NULL;
- struct cdap_rcvd * rcvd = NULL;
-
- assert(instance);
-
- pthread_mutex_lock(&instance->rcvd_lock);
-
- list_for_each_safe(p, h, &instance->rcvd) {
- rcvd = list_entry(p, struct cdap_rcvd, next);
- if (rcvd->key == key) {
- list_del(&rcvd->next);
- pthread_mutex_unlock(&instance->rcvd_lock);
- return rcvd;
- }
- }
-
- pthread_mutex_unlock(&instance->rcvd_lock);
-
- assert(false);
-
- return NULL;
-}
-
-static struct cdap_req * cdap_sent_add(struct cdap * instance,
- int fd,
- invoke_id_t iid,
- cdap_key_t key)
-{
- struct cdap_req * req;
-
- assert(instance);
- assert(!cdap_sent_has_key(instance, key));
-
- req = cdap_req_create(fd, iid, key);
- if (req == NULL)
- return NULL;
-
- pthread_rwlock_wrlock(&instance->sent_lock);
-
- list_add(&req->next, &instance->sent);
-
- pthread_rwlock_unlock(&instance->sent_lock);
-
- return req;
-}
-
-static void cdap_sent_del(struct cdap * instance,
- struct cdap_req * req)
-{
- assert(instance);
- assert(req);
-
- assert(cdap_sent_has_key(instance, req->key));
-
- pthread_rwlock_wrlock(&instance->sent_lock);
-
- list_del(&req->next);
-
- pthread_rwlock_unlock(&instance->sent_lock);
-
- cdap_req_destroy(req);
-}
-
-static void cdap_sent_destroy(struct cdap * instance)
-{
- struct list_head * p = NULL;
- struct list_head * h = NULL;
-
- assert(instance);
-
- pthread_rwlock_wrlock(&instance->sent_lock);
-
- list_for_each_safe(p, h, &instance->sent) {
- struct cdap_req * req = list_entry(p, struct cdap_req, next);
- list_del(&req->next);
- cdap_req_cancel(req);
- cdap_req_destroy(req);
- }
-
- pthread_rwlock_unlock(&instance->sent_lock);
-}
-
-static void cdap_rcvd_destroy(struct cdap * instance)
-{
- struct list_head * p = NULL;
- struct list_head * h = NULL;
-
- assert(instance);
-
- pthread_mutex_lock(&instance->rcvd_lock);
-
- list_for_each_safe(p, h, &instance->rcvd) {
- struct cdap_rcvd * r = list_entry(p, struct cdap_rcvd, next);
- list_del(&r->next);
- if (r->data != NULL)
- free(r->data);
- if (r->name != NULL)
- free(r->name);
- free(r);
- }
-
- pthread_cond_broadcast(&instance->rcvd_cond);
-
- pthread_mutex_unlock(&instance->rcvd_lock);
-}
-
-static void set_proc(struct cdap * instance,
- bool status)
-{
- pthread_mutex_lock(&instance->mtx);
-
- instance->proc = status;
- pthread_cond_signal(&instance->cond);
-
- pthread_mutex_unlock(&instance->mtx);
-}
-
-static void * sdu_reader(void * o)
-{
- struct cdap * instance = (struct cdap *) o;
- struct cdap_req * req;
- struct cdap_rcvd * rcvd;
- cdap_t * msg;
- uint8_t buf[BUF_SIZE];
- ssize_t len;
- buffer_t data;
-
- while (fevent(instance->set, instance->fq, NULL)) {
- int fd;
- set_proc(instance, true);
- fd = fqueue_next(instance->fq);
- len = flow_read(fd, buf, BUF_SIZE);
- if (len < 0) {
- set_proc(instance, false);
- continue;
- }
-
- msg = cdap__unpack(NULL, len, buf);
- if (msg == NULL) {
- set_proc(instance, false);
- continue;
- }
-
- if (msg->opcode != CDAP_REPLY) {
- rcvd = malloc(sizeof(*rcvd));
- if (rcvd == NULL) {
- cdap__free_unpacked(msg, NULL);
- set_proc(instance, false);
- continue;
- }
-
- assert(msg->name);
-
- rcvd->opcode = msg->opcode;
- rcvd->fd = fd;
- rcvd->iid = msg->invoke_id;
- rcvd->key = next_id(instance);
- if (rcvd->key == INVALID_ID) {
- cdap__free_unpacked(msg, NULL);
- set_proc(instance, false);
- free(rcvd);
- continue;
- }
-
- rcvd->flags = msg->flags;
- rcvd->proc = false;
- rcvd->name = strdup(msg->name);
- if (rcvd->name == NULL) {
- release_id(instance, rcvd->key);
- cdap__free_unpacked(msg, NULL);
- set_proc(instance, false);
- free(rcvd);
- continue;
- }
-
- if (msg->has_value) {
- rcvd->len = msg->value.len;
- rcvd->data = malloc(rcvd->len);
- if (rcvd->data == NULL) {
- release_id(instance, rcvd->key);
- cdap__free_unpacked(msg, NULL);
- set_proc(instance, false);
- free(rcvd->name);
- free(rcvd);
- continue;
- }
- memcpy(rcvd->data, msg->value.data, rcvd->len);
- } else {
- rcvd->len = 0;
- rcvd->data = NULL;
- }
-
- pthread_mutex_lock(&instance->rcvd_lock);
-
- list_add(&rcvd->next, &instance->rcvd);
-
- pthread_cond_signal(&instance->rcvd_cond);
- pthread_mutex_unlock(&instance->rcvd_lock);
- } else {
- req = cdap_sent_get_by_iid(instance, msg->invoke_id);
- if (req == NULL) {
- cdap__free_unpacked(msg, NULL);
- set_proc(instance, false);
- continue;
- }
-
- if (msg->has_value) {
- data.len = msg->value.len;
- data.data = malloc(data.len);
- if (data.data == NULL) {
- cdap__free_unpacked(msg, NULL);
- set_proc(instance, false);
- continue;
- }
- memcpy(data.data, msg->value.data, data.len);
- } else {
- data.len = 0;
- data.data = NULL;
- }
-
- cdap_req_respond(req, msg->result, data);
- }
-
- cdap__free_unpacked(msg, NULL);
- set_proc(instance, false);
- }
-
- return (void *) 0;
-}
-
-struct cdap * cdap_create()
-{
- struct cdap * instance = NULL;
-
- instance = malloc(sizeof(*instance));
- if (instance == NULL)
- goto fail_malloc;
-
- if (pthread_rwlock_init(&instance->flows_lock, NULL))
- goto fail_flows_lock;
-
- if (pthread_mutex_init(&instance->ids_lock, NULL))
- goto fail_ids_lock;
-
- if (pthread_mutex_init(&instance->rcvd_lock, NULL))
- goto fail_rcvd_lock;
-
- if (pthread_rwlock_init(&instance->sent_lock, NULL))
- goto fail_sent_lock;
-
- if (pthread_cond_init(&instance->rcvd_cond, NULL))
- goto fail_rcvd_cond;
-
- if (pthread_mutex_init(&instance->mtx, NULL))
- goto fail_mtx;
-
- if (pthread_cond_init(&instance->cond, NULL))
- goto fail_cond;
-
- instance->ids = bmp_create(IDS_SIZE, 0);
- if (instance->ids == NULL)
- goto fail_bmp_create;
-
- instance->set = fset_create();
- if (instance->set == NULL)
- goto fail_set_create;
-
- instance->fq = fqueue_create();
- if (instance->fq == NULL)
- goto fail_fqueue_create;
-
- instance->n_flows = 0;
- instance->proc = false;
-
- list_head_init(&instance->flows);
- list_head_init(&instance->sent);
- list_head_init(&instance->rcvd);
-
- if (pthread_create(&instance->reader, NULL, sdu_reader, instance))
- goto fail_pthread_create;
-
- return instance;
-
- fail_pthread_create:
- fqueue_destroy(instance->fq);
- fail_fqueue_create:
- fset_destroy(instance->set);
- fail_set_create:
- bmp_destroy(instance->ids);
- fail_bmp_create:
- pthread_cond_destroy(&instance->cond);
- fail_cond:
- pthread_mutex_destroy(&instance->mtx);
- fail_mtx:
- pthread_cond_destroy(&instance->rcvd_cond);
- fail_rcvd_cond:
- pthread_rwlock_destroy(&instance->sent_lock);
- fail_sent_lock:
- pthread_mutex_destroy(&instance->rcvd_lock);
- fail_rcvd_lock:
- pthread_mutex_destroy(&instance->ids_lock);
- fail_ids_lock:
- pthread_rwlock_destroy(&instance->flows_lock);
- fail_flows_lock:
- free(instance);
- fail_malloc:
- return NULL;
-}
-
-int cdap_destroy(struct cdap * instance)
-{
- struct list_head * p;
- struct list_head * h;
-
- if (instance == NULL)
- return 0;
-
- pthread_cancel(instance->reader);
- pthread_join(instance->reader, NULL);
-
- fqueue_destroy(instance->fq);
-
- fset_destroy(instance->set);
-
- pthread_cond_destroy(&instance->cond);
- pthread_mutex_destroy(&instance->mtx);
-
- pthread_rwlock_wrlock(&instance->flows_lock);
-
- list_for_each_safe(p,h, &instance->flows) {
- struct fd_el * e = list_entry(p, struct fd_el, next);
- list_del(&e->next);
- free(e);
- }
-
- pthread_rwlock_unlock(&instance->flows_lock);
-
- pthread_rwlock_destroy(&instance->flows_lock);
-
- pthread_mutex_lock(&instance->ids_lock);
-
- bmp_destroy(instance->ids);
-
- pthread_mutex_unlock(&instance->ids_lock);
-
- pthread_mutex_destroy(&instance->ids_lock);
-
- cdap_sent_destroy(instance);
-
- pthread_rwlock_destroy(&instance->sent_lock);
-
- cdap_rcvd_destroy(instance);
-
- pthread_mutex_destroy(&instance->rcvd_lock);
-
- free(instance);
-
- return 0;
-}
-
-int cdap_add_flow(struct cdap * instance,
- int fd)
-{
- struct fd_el * e;
-
- if (fd < 0)
- return -EINVAL;
-
- e = malloc(sizeof(*e));
- if (e == NULL)
- return -ENOMEM;
-
- e->fd = fd;
-
- pthread_rwlock_wrlock(&instance->flows_lock);
-
- if (fset_add(instance->set, fd)) {
- pthread_rwlock_unlock(&instance->flows_lock);
- free(e);
- return -1;
- }
-
- list_add(&e->next, &instance->flows);
-
- ++instance->n_flows;
-
- pthread_rwlock_unlock(&instance->flows_lock);
-
- return 0;
-}
-
-int cdap_del_flow(struct cdap * instance,
- int fd)
-{
- struct list_head * p;
- struct list_head * h;
-
- if (fd < 0)
- return -EINVAL;
-
- pthread_rwlock_wrlock(&instance->flows_lock);
-
- fset_del(instance->set, fd);
-
- list_for_each_safe(p, h, &instance->flows) {
- struct fd_el * e = list_entry(p, struct fd_el, next);
- if (e->fd == fd) {
- list_del(&e->next);
- free(e);
- break;
- }
- }
-
- --instance->n_flows;
-
- pthread_rwlock_unlock(&instance->flows_lock);
-
- pthread_mutex_lock(&instance->mtx);
-
- pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
- (void *) &instance->mtx);
-
- while (instance->proc)
- pthread_cond_wait(&instance->cond, &instance->mtx);
-
- pthread_cleanup_pop(true);
-
- return 0;
-}
-
-static int write_msg(int fd,
- cdap_t * msg)
-{
- uint8_t * data;
- size_t len;
-
- assert(msg);
-
- len = cdap__get_packed_size(msg);
- if (len == 0)
- return -1;
-
- data = malloc(len);
- if (data == NULL)
- return -ENOMEM;
-
- cdap__pack(msg, data);
-
- if (flow_write(fd, data, len)) {
- free(data);
- return -1;
- }
-
- free(data);
-
- return 0;
-}
-
-cdap_key_t * cdap_request_send(struct cdap * instance,
- enum cdap_opcode code,
- const char * name,
- const void * data,
- size_t len,
- uint32_t flags)
-{
- cdap_key_t * keys;
- cdap_key_t * key;
- cdap_t msg = CDAP__INIT;
- struct list_head * p;
- int ret;
-
- if (instance == NULL || name == NULL || code > CDAP_DELETE)
- return NULL;
-
- pthread_rwlock_rdlock(&instance->flows_lock);
-
- keys = malloc(sizeof(*keys) * (instance->n_flows + 1));
- if (keys == NULL) {
- pthread_rwlock_unlock(&instance->flows_lock);
- return NULL;
- }
-
- memset(keys, INVALID_CDAP_KEY, sizeof(*keys) * (instance->n_flows + 1));
-
- key = keys;
-
- cdap__init(&msg);
-
- msg.opcode = code;
- msg.name = (char *) name;
- msg.has_flags = true;
- msg.flags = flags;
-
- if (data != NULL) {
- msg.has_value = true;
- msg.value.data = (uint8_t *) data;
- msg.value.len = len;
- }
-
- list_for_each(p, &instance->flows) {
- struct cdap_req * req;
- invoke_id_t iid;
- struct fd_el * e;
-
- iid = next_id(instance);
- if (iid == INVALID_ID) {
- pthread_rwlock_unlock(&instance->flows_lock);
- return keys;
- }
-
- msg.invoke_id = iid;
-
- e = list_entry(p, struct fd_el, next);
-
- *key = next_id(instance);
- if (*key == INVALID_ID) {
- release_id(instance, iid);
- pthread_rwlock_unlock(&instance->flows_lock);
- return keys;
- }
-
- req = cdap_sent_add(instance, e->fd, iid, *key);
- if (req == NULL) {
- release_id(instance, *key);
- release_id(instance, iid);
- pthread_rwlock_unlock(&instance->flows_lock);
- *key = INVALID_CDAP_KEY;
- return keys;
- }
-
- ret = write_msg(e->fd, &msg);
- if (ret == -ENOMEM) {
- cdap_sent_del(instance, req);
- release_id(instance, *key);
- release_id(instance, iid);
- pthread_rwlock_unlock(&instance->flows_lock);
- *key = INVALID_CDAP_KEY;
- return keys;
- }
-
- if (ret < 0) {
- cdap_sent_del(instance, req);
- release_id(instance, *key);
- release_id(instance, iid);
- pthread_rwlock_unlock(&instance->flows_lock);
- *key = INVALID_CDAP_KEY;
- return keys;
- }
-
- ++key;
- }
-
- pthread_rwlock_unlock(&instance->flows_lock);
-
- return keys;
-}
-
-int cdap_reply_wait(struct cdap * instance,
- cdap_key_t key,
- uint8_t ** data,
- size_t * len)
-{
- int ret;
- struct cdap_req * r;
- invoke_id_t iid;
-
- if (instance == NULL || (data != NULL && len == NULL))
- return -EINVAL;
-
- r = cdap_sent_get_by_key(instance, key);
- if (r == NULL)
- return -EINVAL;
-
- iid = r->iid;
-
- ret = cdap_req_wait(r);
- if (ret < 0) {
- cdap_sent_del(instance, r);
- release_id(instance, iid);
- release_id(instance, key);
- return ret;
- }
-
- assert(ret == 0);
-
- if (data != NULL) {
- *data = r->data.data;
- *len = r->data.len;
- }
-
- ret = r->response;
-
- cdap_sent_del(instance, r);
- release_id(instance, iid);
- release_id(instance, key);
-
- return ret;
-}
-
-cdap_key_t cdap_request_wait(struct cdap * instance,
- enum cdap_opcode * opcode,
- char ** name,
- uint8_t ** data,
- size_t * len,
- uint32_t * flags)
-{
- struct cdap_rcvd * rcv = NULL;
-
- if (instance == NULL || opcode == NULL || name == NULL || data == NULL
- || len == NULL || flags == NULL)
- return -EINVAL;
-
- pthread_mutex_lock(&instance->rcvd_lock);
-
- pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
- (void *) &instance->rcvd_lock);
-
- while (rcv == NULL) {
- while (list_is_empty(&instance->rcvd))
- pthread_cond_wait(&instance->rcvd_cond,
- &instance->rcvd_lock);
-
- rcv = list_first_entry(&instance->rcvd, struct cdap_rcvd, next);
- if (rcv->proc) {
- rcv = NULL;
- pthread_cond_wait(&instance->rcvd_cond,
- &instance->rcvd_lock);
- }
- }
-
- assert(rcv->proc == false);
-
- rcv->proc = true;
- list_del(&rcv->next);
- list_add_tail(&rcv->next, &instance->rcvd);
-
- pthread_cleanup_pop(true);
-
- *opcode = rcv->opcode;
- *name = rcv->name;
- *data = rcv->data;
- *len = rcv->len;
- *flags = rcv->flags;
-
- rcv->name = NULL;
- rcv->data = NULL;
-
- return rcv->key;
-}
-
-int cdap_reply_send(struct cdap * instance,
- cdap_key_t key,
- int result,
- const void * data,
- size_t len)
-{
- int fd;
- cdap_t msg = CDAP__INIT;
- struct cdap_rcvd * rcvd;
-
- if (instance == NULL)
- return -EINVAL;
-
- rcvd = cdap_rcvd_get_by_key(instance, key);
- if (rcvd == NULL)
- return -1;
-
- msg.opcode = CDAP_REPLY;
- msg.invoke_id = rcvd->iid;
- msg.has_result = true;
- msg.result = result;
-
- if (data != NULL) {
- msg.has_value = true;
- msg.value.data = (uint8_t *) data;
- msg.value.len = len;
- }
-
- fd = rcvd->fd;
-
- release_id(instance, rcvd->key);
-
- assert(rcvd->data == NULL);
- assert(rcvd->name == NULL);
- assert(rcvd->proc);
-
- free(rcvd);
-
- return write_msg(fd, &msg);
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 03:23:53 +0000