1 /*- 2 * BSD LICENSE 3 * 4 * Copyright (c) Intel Corporation. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * * Neither the name of Intel Corporation nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef SPDK_INIT_INTERNAL_H 34 #define SPDK_INIT_INTERNAL_H 35 36 #include "spdk/stdinc.h" 37 #include "spdk/queue.h" 38 39 struct spdk_json_write_ctx; 40 41 struct spdk_subsystem { 42 const char *name; 43 /* User must call spdk_subsystem_init_next() when they are done with their initialization. */ 44 void (*init)(void); 45 void (*fini)(void); 46 47 /** 48 * Write JSON configuration handler. 49 * 50 * \param w JSON write context 51 */ 52 void (*write_config_json)(struct spdk_json_write_ctx *w); 53 TAILQ_ENTRY(spdk_subsystem) tailq; 54 }; 55 56 struct spdk_subsystem_depend { 57 const char *name; 58 const char *depends_on; 59 TAILQ_ENTRY(spdk_subsystem_depend) tailq; 60 }; 61 62 void spdk_add_subsystem(struct spdk_subsystem *subsystem); 63 void spdk_add_subsystem_depend(struct spdk_subsystem_depend *depend); 64 65 void spdk_subsystem_init_next(int rc); 66 void spdk_subsystem_fini_next(void); 67 68 /** 69 * \brief Register a new subsystem 70 */ 71 #define SPDK_SUBSYSTEM_REGISTER(_name) \ 72 __attribute__((constructor)) static void _name ## _register(void) \ 73 { \ 74 spdk_add_subsystem(&_name); \ 75 } 76 77 /** 78 * \brief Declare that a subsystem depends on another subsystem. 79 */ 80 #define SPDK_SUBSYSTEM_DEPEND(_name, _depends_on) \ 81 static struct spdk_subsystem_depend __subsystem_ ## _name ## _depend_on ## _depends_on = { \ 82 .name = #_name, \ 83 .depends_on = #_depends_on, \ 84 }; \ 85 __attribute__((constructor)) static void _name ## _depend_on ## _depends_on(void) \ 86 { \ 87 spdk_add_subsystem_depend(&__subsystem_ ## _name ## _depend_on ## _depends_on); \ 88 } 89 90 #endif 91