a6dbe3721e
per Intel policy to include file commit date using git cmd below. The policy does not apply to non-Intel (C) notices. git log --follow -C90% --format=%ad --date default <file> | tail -1 and then pull just the 4 digit year from the result. Intel copyrights were not added to files where Intel either had no contribution ot the contribution lacked substance (ie license header updates, formatting changes, etc). Contribution date used "--follow -C95%" to get the most accurate date. Note that several files in this patch didn't end the license/(c) block with a blank comment line so these were added as the vast majority of files do have this last blank line. Simply there for consistency. Signed-off-by: paul luse <paul.e.luse@intel.com> Change-Id: Id5b7ce4f658fe87132f14139ead58d6e285c04d4 Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15192 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Community-CI: Mellanox Build Bot
123 lines
2.7 KiB
C
123 lines
2.7 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright (C) 2018 Intel Corporation.
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* All rights reserved.
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*/
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#include <sys/queue.h>
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#include "spdk/stdinc.h"
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#include "spdk/util.h"
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#include "spdk/queue.h"
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#include "spdk/string.h"
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#include "spdk/log.h"
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#include "spdk/notify.h"
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#define SPDK_NOTIFY_MAX_EVENTS 1024
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struct spdk_notify_type {
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char name[SPDK_NOTIFY_MAX_NAME_SIZE];
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TAILQ_ENTRY(spdk_notify_type) tailq;
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};
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pthread_mutex_t g_events_lock = PTHREAD_MUTEX_INITIALIZER;
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static struct spdk_notify_event g_events[SPDK_NOTIFY_MAX_EVENTS];
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static uint64_t g_events_head;
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static TAILQ_HEAD(, spdk_notify_type) g_notify_types = TAILQ_HEAD_INITIALIZER(g_notify_types);
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struct spdk_notify_type *
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spdk_notify_type_register(const char *type)
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{
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struct spdk_notify_type *it = NULL;
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if (!type) {
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SPDK_ERRLOG("Invalid notification type %p\n", type);
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return NULL;
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} else if (!type[0] || strlen(type) >= SPDK_NOTIFY_MAX_NAME_SIZE) {
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SPDK_ERRLOG("Notification type '%s' too short or too long\n", type);
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return NULL;
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}
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pthread_mutex_lock(&g_events_lock);
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TAILQ_FOREACH(it, &g_notify_types, tailq) {
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if (strcmp(type, it->name) == 0) {
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SPDK_NOTICELOG("Notification type '%s' already registered.\n", type);
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goto out;
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}
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}
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it = calloc(1, sizeof(*it));
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if (it == NULL) {
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goto out;
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}
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snprintf(it->name, sizeof(it->name), "%s", type);
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TAILQ_INSERT_TAIL(&g_notify_types, it, tailq);
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out:
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pthread_mutex_unlock(&g_events_lock);
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return it;
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}
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const char *
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spdk_notify_type_get_name(const struct spdk_notify_type *type)
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{
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return type->name;
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}
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void
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spdk_notify_foreach_type(spdk_notify_foreach_type_cb cb, void *ctx)
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{
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struct spdk_notify_type *it;
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pthread_mutex_lock(&g_events_lock);
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TAILQ_FOREACH(it, &g_notify_types, tailq) {
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if (cb(it, ctx)) {
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break;
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}
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}
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pthread_mutex_unlock(&g_events_lock);
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}
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uint64_t
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spdk_notify_send(const char *type, const char *ctx)
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{
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uint64_t head;
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struct spdk_notify_event *ev;
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pthread_mutex_lock(&g_events_lock);
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head = g_events_head;
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g_events_head++;
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ev = &g_events[head % SPDK_NOTIFY_MAX_EVENTS];
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spdk_strcpy_pad(ev->type, type, sizeof(ev->type), '\0');
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spdk_strcpy_pad(ev->ctx, ctx, sizeof(ev->ctx), '\0');
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pthread_mutex_unlock(&g_events_lock);
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return head;
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}
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uint64_t
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spdk_notify_foreach_event(uint64_t start_idx, uint64_t max,
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spdk_notify_foreach_event_cb cb_fn, void *ctx)
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{
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uint64_t i;
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pthread_mutex_lock(&g_events_lock);
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if (g_events_head > SPDK_NOTIFY_MAX_EVENTS && start_idx < g_events_head - SPDK_NOTIFY_MAX_EVENTS) {
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start_idx = g_events_head - SPDK_NOTIFY_MAX_EVENTS;
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}
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for (i = 0; start_idx < g_events_head && i < max; start_idx++, i++) {
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if (cb_fn(start_idx, &g_events[start_idx % SPDK_NOTIFY_MAX_EVENTS], ctx)) {
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break;
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}
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}
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pthread_mutex_unlock(&g_events_lock);
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return i;
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}
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