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1 //========================================================================= |
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2 // |
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3 // exit.cxx |
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4 // |
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5 // Implementation of the exit() function |
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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 Cygnus eCos Public License |
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12 // Version 1.0 (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://sourceware.cygnus.com/ecos |
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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 Cygnus Operating System, released |
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22 // September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Cygnus. Portions created |
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25 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. |
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26 // ------------------------------------------- |
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27 // |
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28 //####COPYRIGHTEND#### |
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29 //========================================================================= |
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30 //#####DESCRIPTIONBEGIN#### |
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31 // |
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32 // Author(s): jlarmour |
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33 // Contributors: jlarmour@cygnus.co.uk |
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34 // Date: 1998-08-31 |
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35 // Purpose: |
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36 // Description: |
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37 // Usage: |
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38 // |
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39 //####DESCRIPTIONEND#### |
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40 // |
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41 //========================================================================= |
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42 |
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43 // CONFIGURATION |
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44 |
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45 #include <pkgconf/libc.h> // Configuration header |
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46 |
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47 // Include the C library? |
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48 #ifdef CYGPKG_LIBC |
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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 #include <cyg/infra/cyg_ass.h> // Common assertion support |
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55 #include <stdio.h> // fflush() |
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56 #include <errno.h> // errno |
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57 #include <stdlib.h> // Header for all stdlib functions |
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58 // (like this one) |
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59 #include "clibincl/stdlibsupp.hxx" // Support for stdlib functions |
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60 |
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61 // SYMBOLS |
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62 |
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63 externC void |
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64 exit( int ) CYGPRI_LIBC_WEAK_ALIAS("__libc_exit") CYGPRI_LIBC_NORETURN; |
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65 |
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66 // FUNCTIONS |
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67 |
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68 externC void |
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69 __libc_exit( int status ) |
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70 { |
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71 CYG_REPORT_FUNCTION(); // shouldn't return, but CYG_FAIL will catch it |
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72 CYG_REPORT_FUNCARG1DV( status ); |
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73 |
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74 // Strictly the only thing exit() does is invoke the atexit handlers |
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75 // and flush stdio buffers. Anything else is for _exit() (aka |
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76 // __libc__exit() within the implementation) |
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77 |
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78 // we start with the atexit handlers |
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79 cyg_libc_invoke_atexit_handlers(); |
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80 |
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81 // we only need to flush stdio if we have buffered I/O. |
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82 #if defined(CYGPKG_LIBC_STDIO) && \ |
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83 defined(CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO) |
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84 |
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85 int rc; |
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86 |
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87 CYG_TRACE0( true, "Calling fflush( NULL )" ); |
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88 rc = fflush( NULL ); |
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89 |
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90 CYG_TRACE2( rc != 0, "fflush() returned non-zero. It returned %d and " |
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91 "errno indicates the error: %s", rc, strerror(errno) ); |
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92 |
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93 |
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94 #endif |
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95 |
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96 __libc__exit( status ); |
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97 |
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98 CYG_FAIL( "__libc_exit() returning!!!" ); |
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99 |
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100 CYG_REPORT_RETURN(); |
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101 } // __libc_exit() |
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102 |
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103 |
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104 #endif // ifdef CYGPKG_LIBC |
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105 |
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106 // EOF exit.cxx |
