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 bool g_scheduler_delay = false; 35 36 struct scheduled_ops { 37 spdk_thread_fn fn; 38 void *ctx; 39 40 TAILQ_ENTRY(scheduled_ops) ops_queue; 41 }; 42 43 static TAILQ_HEAD(, scheduled_ops) g_scheduled_ops = TAILQ_HEAD_INITIALIZER(g_scheduled_ops); 44 45 void _bs_flush_scheduler(uint32_t); 46 47 static void 48 _bs_send_msg(spdk_thread_fn fn, void *ctx, void *thread_ctx) 49 { 50 if (g_scheduler_delay) { 51 struct scheduled_ops *ops = calloc(1, sizeof(*ops)); 52 53 SPDK_CU_ASSERT_FATAL(ops != NULL); 54 ops->fn = fn; 55 ops->ctx = ctx; 56 TAILQ_INSERT_TAIL(&g_scheduled_ops, ops, ops_queue); 57 58 } else { 59 fn(ctx); 60 } 61 } 62 63 static void 64 _bs_flush_scheduler_single(void) 65 { 66 struct scheduled_ops *op; 67 TAILQ_HEAD(, scheduled_ops) ops; 68 TAILQ_INIT(&ops); 69 70 TAILQ_SWAP(&g_scheduled_ops, &ops, scheduled_ops, ops_queue); 71 72 while (!TAILQ_EMPTY(&ops)) { 73 op = TAILQ_FIRST(&ops); 74 TAILQ_REMOVE(&ops, op, ops_queue); 75 76 op->fn(op->ctx); 77 free(op); 78 } 79 } 80 81 void 82 _bs_flush_scheduler(uint32_t n) 83 { 84 while (n--) { 85 _bs_flush_scheduler_single(); 86 } 87 } 88