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annotate packages/language/c/libc/startup/current/src/cstartup.cxx @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
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children e0c0827131d1
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1 //=======================================================================
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2 //
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3 // cstartup.cxx
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4 //
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5 // Support for startup of ISO C environment
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6 //
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7 //========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): jlarmour
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35 // Contributors:
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36 // Date: 2000-04-30
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37 // Purpose:
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38 // Description:
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39 // Usage:
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40 //
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41 //####DESCRIPTIONEND####
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42 //
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43 //========================================================================
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44
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45 // CONFIGURATION
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46
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47 #include <pkgconf/system.h> // CYGPKG_KERNEL
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48 #include <pkgconf/libc_startup.h> // Configuration header
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49
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50 // INCLUDES
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51
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52 #include <cyg/infra/cyg_type.h> // Common type definitions and support
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53 #include <cyg/infra/cyg_trac.h> // Common tracing support
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54
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55 #ifdef CYGPKG_KERNEL
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56 # include <pkgconf/kernel.h> // eCos kernel configuration
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57 # include <cyg/kernel/thread.hxx> // eCos thread support
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58 # include <cyg/kernel/thread.inl>
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59 #endif
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60
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61
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62 // FUNCTION PROTOTYPES
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63
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64 externC void
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65 cyg_libc_invoke_main( CYG_ADDRWORD );
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66
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67 // EXTERNS
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68
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69 #ifdef CYGSEM_LIBC_STARTUP_MAIN_THREAD
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70 extern Cyg_Thread cyg_libc_main_thread;
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71
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72 // FUNCTIONS
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73
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74 externC void
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75 cyg_iso_c_start( void )
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76 {
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77 static int initialized=0;
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78
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79 CYG_REPORT_FUNCNAME( "cyg_iso_c_start" );
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80 CYG_REPORT_FUNCARGVOID();
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81
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82 if (initialized++ == 0) {
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83 CYG_TRACE0( true, "Resuming cyg_libc_main_thread" );
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84 cyg_libc_main_thread.resume();
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85 }
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86 CYG_REPORT_RETURN();
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87
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88 } // cyg_iso_c_start()
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89
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90 // define an object that will automatically call cyg_iso_c_start()
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91
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92 class cyg_libc_startup_dummy_constructor_class {
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93 public:
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94 cyg_libc_startup_dummy_constructor_class() { cyg_iso_c_start(); }
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95 };
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96
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97 static cyg_libc_startup_dummy_constructor_class cyg_libc_startup_obj
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98 CYGBLD_ATTRIB_INIT_PRI(CYG_INIT_LIBC);
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99
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100 #elif defined( CYGSEM_LIBC_STARTUP_MAIN_INITCONTEXT )
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101
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102 // otherwise replace the default cyg_user_start(), but of course keep
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103 // it a weak symbol in case the user wants to override
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104
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105 externC void
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106 cyg_user_start(void) CYGBLD_ATTRIB_WEAK;
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107
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108 externC void
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109 cyg_user_start(void)
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110 {
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111 cyg_libc_invoke_main(0);
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112 }
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113
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114 externC void
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115 cyg_iso_c_start( void )
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116 {
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117 static int initialized=0;
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118
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119 CYG_REPORT_FUNCNAME( "cyg_iso_c_start" );
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120 CYG_REPORT_FUNCARGVOID();
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121
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122 // In case they want to explicitly invoke the C library from
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123 // cyg_user_start() themselves
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124 if (initialized++ == 0) {
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125 cyg_libc_invoke_main(0);
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126 }
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127 CYG_REPORT_RETURN();
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128 }
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129 #else
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130
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131 externC void
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132 cyg_iso_c_start( void ) {}
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133
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134 #endif
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135
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136 // EOF cstartup.cxx