1 /*- 2 * BSD LICENSE 3 * 4 * Copyright (c) Intel Corporation. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include "spdk/thread.h" 35 36 bool g_scheduler_delay = false; 37 38 struct scheduled_ops { 39 spdk_msg_fn fn; 40 void *ctx; 41 42 TAILQ_ENTRY(scheduled_ops) ops_queue; 43 }; 44 45 static TAILQ_HEAD(, scheduled_ops) g_scheduled_ops = TAILQ_HEAD_INITIALIZER(g_scheduled_ops); 46 47 void _bs_flush_scheduler(uint32_t); 48 49 static void 50 _bs_send_msg(spdk_msg_fn fn, void *ctx, void *thread_ctx) 51 { 52 if (g_scheduler_delay) { 53 struct scheduled_ops *ops = calloc(1, sizeof(*ops)); 54 55 SPDK_CU_ASSERT_FATAL(ops != NULL); 56 ops->fn = fn; 57 ops->ctx = ctx; 58 TAILQ_INSERT_TAIL(&g_scheduled_ops, ops, ops_queue); 59 60 } else { 61 fn(ctx); 62 } 63 } 64 65 static void 66 _bs_flush_scheduler_single(void) 67 { 68 struct scheduled_ops *op; 69 TAILQ_HEAD(, scheduled_ops) ops; 70 TAILQ_INIT(&ops); 71 72 TAILQ_SWAP(&g_scheduled_ops, &ops, scheduled_ops, ops_queue); 73 74 while (!TAILQ_EMPTY(&ops)) { 75 op = TAILQ_FIRST(&ops); 76 TAILQ_REMOVE(&ops, op, ops_queue); 77 78 op->fn(op->ctx); 79 free(op); 80 } 81 } 82 83 void 84 _bs_flush_scheduler(uint32_t n) 85 { 86 while (n--) { 87 _bs_flush_scheduler_single(); 88 } 89 } 90