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Diffstat (limited to 'src/lib/shm_ap_rbuff.c')
-rw-r--r--src/lib/shm_ap_rbuff.c661
1 files changed, 0 insertions, 661 deletions
diff --git a/src/lib/shm_ap_rbuff.c b/src/lib/shm_ap_rbuff.c
deleted file mode 100644
index 5cbf5bd0..00000000
--- a/src/lib/shm_ap_rbuff.c
+++ /dev/null
@@ -1,661 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016
- *
- * Ring buffer for application processes
- *
- * Dimitri Staessens <dimitri.staessens@intec.ugent.be>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <ouroboros/config.h>
-#include <ouroboros/shm_ap_rbuff.h>
-#include <ouroboros/lockfile.h>
-#include <ouroboros/time_utils.h>
-#include <ouroboros/errno.h>
-
-#define OUROBOROS_PREFIX "shm_ap_rbuff"
-
-#include <ouroboros/logs.h>
-
-#include <pthread.h>
-#include <sys/mman.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdint.h>
-#include <unistd.h>
-#include <signal.h>
-#include <sys/stat.h>
-#include <assert.h>
-
-#define FN_MAX_CHARS 255
-
-#define SHM_RBUFF_FILE_SIZE (SHM_BUFFER_SIZE * sizeof(struct rb_entry) \
- + IRMD_MAX_FLOWS * sizeof(int8_t) \
- + IRMD_MAX_FLOWS * sizeof (ssize_t) \
- + 2 * sizeof(size_t) + sizeof(pthread_mutex_t) \
- + 2 * sizeof (pthread_cond_t))
-
-#define shm_rbuff_used(rb)((*rb->head + SHM_BUFFER_SIZE - *rb->tail) \
- & (SHM_BUFFER_SIZE - 1))
-#define shm_rbuff_free(rb)(shm_rbuff_used(rb) + 1 < SHM_BUFFER_SIZE)
-#define shm_rbuff_empty(rb) (*rb->head == *rb->tail)
-#define head_el_ptr(rb) (rb->shm_base + *rb->head)
-#define tail_el_ptr(rb) (rb->shm_base + *rb->tail)
-
-struct shm_ap_rbuff {
- struct rb_entry * shm_base; /* start of entry */
- size_t * head; /* start of ringbuffer head */
- size_t * tail; /* start of ringbuffer tail */
- int8_t * acl; /* start of port_id access table */
- ssize_t * cntrs; /* start of port_id counters */
- pthread_mutex_t * lock; /* lock all free space in shm */
- pthread_cond_t * add; /* SDU arrived */
- pthread_cond_t * del; /* SDU removed */
- pid_t api; /* api to which this rb belongs */
- int fd;
-};
-
-struct shm_ap_rbuff * shm_ap_rbuff_create()
-{
- struct shm_ap_rbuff * rb;
- int shm_fd;
- struct rb_entry * shm_base;
- pthread_mutexattr_t mattr;
- pthread_condattr_t cattr;
- char fn[FN_MAX_CHARS];
- mode_t mask;
- int i;
-
- sprintf(fn, SHM_AP_RBUFF_PREFIX "%d", getpid());
-
- rb = malloc(sizeof(*rb));
- if (rb == NULL) {
- LOG_DBG("Could not allocate struct.");
- return NULL;
- }
-
- mask = umask(0);
-
- shm_fd = shm_open(fn, O_CREAT | O_EXCL | O_RDWR, 0666);
- if (shm_fd == -1) {
- LOG_DBG("Failed creating ring buffer.");
- free(rb);
- return NULL;
- }
-
- umask(mask);
-
- if (ftruncate(shm_fd, SHM_RBUFF_FILE_SIZE - 1) < 0) {
- LOG_DBG("Failed to extend ringbuffer.");
- free(rb);
- return NULL;
- }
-#ifndef __APPLE__
- if (write(shm_fd, "", 1) != 1) {
- LOG_DBG("Failed to finalise extension of ringbuffer.");
- free(rb);
- return NULL;
- }
-#endif
- shm_base = mmap(NULL,
- SHM_RBUFF_FILE_SIZE,
- PROT_READ | PROT_WRITE,
- MAP_SHARED,
- shm_fd,
- 0);
-
- if (shm_base == MAP_FAILED) {
- LOG_DBG("Failed to map shared memory.");
- if (close(shm_fd) == -1)
- LOG_DBG("Failed to close invalid shm.");
-
- if (shm_unlink(fn) == -1)
- LOG_DBG("Failed to remove invalid shm.");
-
- free(rb);
- return NULL;
- }
-
- rb->shm_base = shm_base;
- rb->head = (size_t *) (rb->shm_base + SHM_BUFFER_SIZE);
- rb->tail = rb->head + 1;
- rb->acl = (int8_t *) (rb->tail + 1);
- rb->cntrs = (ssize_t *) (rb->acl + IRMD_MAX_FLOWS);
- rb->lock = (pthread_mutex_t *) (rb->cntrs + IRMD_MAX_FLOWS);
- rb->add = (pthread_cond_t *) (rb->lock + 1);
- rb->del = rb->add + 1;
-
- pthread_mutexattr_init(&mattr);
-#ifndef __APPLE__
- pthread_mutexattr_setrobust(&mattr, PTHREAD_MUTEX_ROBUST);
-#endif
- pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED);
- pthread_mutex_init(rb->lock, &mattr);
-
- pthread_condattr_init(&cattr);
- pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED);
-#ifndef __APPLE__
- pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
-#endif
- for (i = 0; i < IRMD_MAX_FLOWS; ++i) {
- rb->cntrs[i] = 0;
- rb->acl[i] = -1;
- }
-
- pthread_cond_init(rb->add, &cattr);
- pthread_cond_init(rb->del, &cattr);
-
- *rb->head = 0;
- *rb->tail = 0;
-
- rb->fd = shm_fd;
- rb->api = getpid();
-
- return rb;
-}
-
-struct shm_ap_rbuff * shm_ap_rbuff_open(pid_t api)
-{
- struct shm_ap_rbuff * rb;
- int shm_fd;
- struct rb_entry * shm_base;
- char fn[FN_MAX_CHARS];
-
- sprintf(fn, SHM_AP_RBUFF_PREFIX "%d", api);
-
- rb = malloc(sizeof(*rb));
- if (rb == NULL) {
- LOG_DBG("Could not allocate struct.");
- return NULL;
- }
-
- shm_fd = shm_open(fn, O_RDWR, 0666);
- if (shm_fd == -1) {
- LOG_DBG("%d failed opening shared memory %s.", getpid(), fn);
- free(rb);
- return NULL;
- }
-
- shm_base = mmap(NULL,
- SHM_RBUFF_FILE_SIZE,
- PROT_READ | PROT_WRITE,
- MAP_SHARED,
- shm_fd,
- 0);
-
- if (shm_base == MAP_FAILED) {
- LOG_DBG("Failed to map shared memory.");
- if (close(shm_fd) == -1)
- LOG_DBG("Failed to close invalid shm.");
-
- if (shm_unlink(fn) == -1)
- LOG_DBG("Failed to remove invalid shm.");
-
- free(rb);
- return NULL;
- }
-
- rb->shm_base = shm_base;
- rb->head = (size_t *) (rb->shm_base + SHM_BUFFER_SIZE);
- rb->tail = rb->head + 1;
- rb->acl = (int8_t *) (rb->tail + 1);
- rb->cntrs = (ssize_t *) (rb->acl + IRMD_MAX_FLOWS);
- rb->lock = (pthread_mutex_t *) (rb->cntrs + IRMD_MAX_FLOWS);
- rb->add = (pthread_cond_t *) (rb->lock + 1);
- rb->del = rb->add + 1;
-
- rb->fd = shm_fd;
- rb->api = api;
-
- return rb;
-}
-
-void shm_ap_rbuff_close(struct shm_ap_rbuff * rb)
-{
- assert(rb);
-
- if (close(rb->fd) < 0)
- LOG_DBG("Couldn't close shared memory.");
-
- if (munmap(rb->shm_base, SHM_RBUFF_FILE_SIZE) == -1)
- LOG_DBG("Couldn't unmap shared memory.");
-
- free(rb);
-}
-
-void shm_ap_rbuff_open_port(struct shm_ap_rbuff * rb, int port_id)
-{
- assert(rb);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- rb->acl[port_id] = 0; /* open */
-
- pthread_mutex_unlock(rb->lock);
-}
-
-int shm_ap_rbuff_close_port(struct shm_ap_rbuff * rb, int port_id)
-{
- int ret = 0;
-
- assert(rb);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- rb->acl[port_id] = -1;
-
- if (rb->cntrs[port_id] > 0)
- ret = -EBUSY;
-
- pthread_mutex_unlock(rb->lock);
-
- return ret;
-}
-
-void shm_ap_rbuff_destroy(struct shm_ap_rbuff * rb)
-{
- char fn[25];
- struct lockfile * lf = NULL;
-
- assert(rb);
-
- if (rb->api != getpid()) {
- lf = lockfile_open();
- if (lf == NULL)
- return;
- if (lockfile_owner(lf) == getpid()) {
- LOG_DBG("Ringbuffer %d destroyed by IRMd %d.",
- rb->api, getpid());
- lockfile_close(lf);
- } else {
- LOG_ERR("AP-I %d tried to destroy rbuff owned by %d.",
- getpid(), rb->api);
- lockfile_close(lf);
- return;
- }
- }
-
- if (close(rb->fd) < 0)
- LOG_DBG("Couldn't close shared memory.");
-
- sprintf(fn, SHM_AP_RBUFF_PREFIX "%d", rb->api);
-
- if (munmap(rb->shm_base, SHM_RBUFF_FILE_SIZE) == -1)
- LOG_DBG("Couldn't unmap shared memory.");
-
- if (shm_unlink(fn) == -1)
- LOG_DBG("Failed to unlink shm.");
-
- free(rb);
-}
-
-int shm_ap_rbuff_write(struct shm_ap_rbuff * rb, struct rb_entry * e)
-{
- assert(rb);
- assert(e);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (rb->acl[e->port_id]) {
- pthread_mutex_unlock(rb->lock);
- return -ENOTALLOC;
- }
-
- if (!shm_rbuff_free(rb)) {
- pthread_mutex_unlock(rb->lock);
- return -1;
- }
-
- if (shm_rbuff_empty(rb))
- pthread_cond_broadcast(rb->add);
-
- *head_el_ptr(rb) = *e;
- *rb->head = (*rb->head + 1) & (SHM_BUFFER_SIZE -1);
-
- ++rb->cntrs[e->port_id];
-
- pthread_mutex_unlock(rb->lock);
-
- return 0;
-}
-
-int shm_ap_rbuff_pop_idx(struct shm_ap_rbuff * rb)
-{
- int ret = 0;
-
- assert(rb);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (shm_rbuff_empty(rb)) {
- pthread_mutex_unlock(rb->lock);
- return -1;
- }
-
- ret = tail_el_ptr(rb)->index;
- --rb->cntrs[tail_el_ptr(rb)->port_id];
- *rb->tail = (*rb->tail + 1) & (SHM_BUFFER_SIZE -1);
-
- pthread_mutex_unlock(rb->lock);
-
- return ret;
-}
-
-static int shm_ap_rbuff_peek_b_all(struct shm_ap_rbuff * rb,
- const struct timespec * timeout)
-{
- struct timespec abstime;
- int ret = 0;
-
- assert(rb);
-
- if (timeout != NULL) {
- clock_gettime(PTHREAD_COND_CLOCK, &abstime);
- ts_add(&abstime, timeout, &abstime);
- }
-
- pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
- (void *) rb->lock);
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- while (shm_rbuff_empty(rb)) {
- if (timeout != NULL)
- ret = pthread_cond_timedwait(rb->add,
- rb->lock,
- &abstime);
- else
- ret = pthread_cond_wait(rb->add, rb->lock);
-#ifndef __APPLE__
- if (ret == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (ret == ETIMEDOUT)
- break;
- }
-
- if (ret != ETIMEDOUT)
- ret = tail_el_ptr(rb)->port_id;
- else
- ret = -ETIMEDOUT;
-
- pthread_cleanup_pop(true);
-
- return ret;
-}
-
-int shm_ap_rbuff_peek_b(struct shm_ap_rbuff * rb,
- bool * set,
- const struct timespec * timeout)
-{
- struct timespec abstime;
- int ret;
-
- assert(rb);
-
- if (set == NULL)
- return shm_ap_rbuff_peek_b_all(rb, timeout);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (timeout != NULL) {
- clock_gettime(PTHREAD_COND_CLOCK, &abstime);
- ts_add(&abstime, timeout, &abstime);
- }
-
- pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
- (void *) rb->lock);
-
- while ((shm_rbuff_empty(rb) || !set[tail_el_ptr(rb)->port_id])
- && (ret != ETIMEDOUT)) {
- while (shm_rbuff_empty(rb)) {
- if (timeout != NULL)
- ret = pthread_cond_timedwait(rb->add,
- rb->lock,
- &abstime);
- else
- ret = pthread_cond_wait(rb->add, rb->lock);
-
-#ifndef __APPLE__
- if (ret == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (ret == ETIMEDOUT)
- break;
- }
-
- while (!set[tail_el_ptr(rb)->port_id]) {
- if (timeout != NULL)
- ret = pthread_cond_timedwait(rb->del,
- rb->lock,
- &abstime);
- else
- ret = pthread_cond_wait(rb->del, rb->lock);
-
-#ifndef __APPLE__
- if (ret == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (ret == ETIMEDOUT)
- break;
- }
- }
-
- if (ret != ETIMEDOUT)
- ret = tail_el_ptr(rb)->port_id;
- else
- ret = -ETIMEDOUT;
-
- pthread_cleanup_pop(true);
-
- return ret;
-}
-
-
-struct rb_entry * shm_ap_rbuff_read(struct shm_ap_rbuff * rb)
-{
- struct rb_entry * e = NULL;
-
- assert(rb);
-
- pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
- (void *) rb->lock);
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- while (shm_rbuff_empty(rb))
-#ifdef __APPLE__
- pthread_cond_wait(rb->add, rb->lock);
-#else
- if (pthread_cond_wait(rb->add, rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- e = malloc(sizeof(*e));
- if (e != NULL) {
- *e = *(rb->shm_base + *rb->tail);
- --rb->cntrs[e->port_id];
- *rb->tail = (*rb->tail + 1) & (SHM_BUFFER_SIZE -1);
- }
-
- pthread_cleanup_pop(true);
-
- return e;
-}
-
-ssize_t shm_ap_rbuff_read_port(struct shm_ap_rbuff * rb, int port_id)
-{
- ssize_t idx = -1;
-
- assert(rb);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (shm_rbuff_empty(rb) || tail_el_ptr(rb)->port_id != port_id) {
- pthread_mutex_unlock(rb->lock);
- return -1;
- }
-
- idx = tail_el_ptr(rb)->index;
- --rb->cntrs[port_id];
- *rb->tail = (*rb->tail + 1) & (SHM_BUFFER_SIZE -1);
-
- pthread_cond_broadcast(rb->del);
- pthread_mutex_unlock(rb->lock);
-
- return idx;
-}
-
-ssize_t shm_ap_rbuff_read_port_b(struct shm_ap_rbuff * rb,
- int port_id,
- const struct timespec * timeout)
-{
- struct timespec abstime;
- int ret = 0;
- ssize_t idx = -1;
-
- assert(rb);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (timeout != NULL) {
- idx = -ETIMEDOUT;
- clock_gettime(PTHREAD_COND_CLOCK, &abstime);
- ts_add(&abstime, timeout, &abstime);
- }
-
- pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
- (void *) rb->lock);
-
- while ((shm_rbuff_empty(rb) || tail_el_ptr(rb)->port_id != port_id)
- && (ret != ETIMEDOUT)) {
- while (shm_rbuff_empty(rb)) {
- if (timeout != NULL)
- ret = pthread_cond_timedwait(rb->add,
- rb->lock,
- &abstime);
- else
- ret = pthread_cond_wait(rb->add, rb->lock);
-#ifndef __APPLE__
- if (ret == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (ret == ETIMEDOUT)
- break;
- }
-
- while (tail_el_ptr(rb)->port_id != port_id) {
- if (timeout != NULL)
- ret = pthread_cond_timedwait(rb->del,
- rb->lock,
- &abstime);
- else
- ret = pthread_cond_wait(rb->del, rb->lock);
-#ifndef __APPLE__
- if (ret == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (ret == ETIMEDOUT)
- break;
- }
- }
-
- if (ret != ETIMEDOUT) {
- idx = tail_el_ptr(rb)->index;
- --rb->cntrs[port_id];
- *rb->tail = (*rb->tail + 1) & (SHM_BUFFER_SIZE -1);
-
- pthread_cond_broadcast(rb->del);
- }
-
- pthread_cleanup_pop(true);
-
- return idx;
-}
-
-void shm_ap_rbuff_reset(struct shm_ap_rbuff * rb)
-{
- assert(rb);
-
- pthread_mutex_lock(rb->lock);
- *rb->tail = 0;
- *rb->head = 0;
- pthread_mutex_unlock(rb->lock);
-}
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