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annotate packages/language/c/libc/setjmp/current/src/longjmp.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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1 //===========================================================================
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2 //
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3 // longjmp.cxx
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4 //
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5 // ISO C standard longjmp() 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 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: Implements ISO standard non-local jump function longjmp()
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39 // per ISO C para 7.6.2.1. This is the "real" alternative to
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40 // the inline version of longjmp()
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41 //
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42 // Usage:
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43 //
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44 //####DESCRIPTIONEND####
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45 //
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46 //===========================================================================
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47
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48 // CONFIGURATION
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49
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50 #include <pkgconf/libc_setjmp.h> // Configuration header
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51
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52 // INCLUDES
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53
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54 #include <cyg/infra/cyg_type.h> // Common type definitions and support
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55 #include <cyg/infra/cyg_trac.h> // Common tracing code
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56 #include <cyg/infra/cyg_ass.h> // Common assertion code
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57 #include <cyg/hal/hal_arch.h> // HAL architecture specific implementation
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58
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59 // We don't want the inline version of longjmp() defined here
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60 #ifdef CYGIMP_LIBC_SETJMP_INLINES
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61 # undef CYGIMP_LIBC_SETJMP_INLINES
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62 #endif
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63
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64 #include <setjmp.h> // Header for setjmp/longjmp
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65
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66
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67 // FUNCTIONS
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68
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69 void
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70 longjmp( jmp_buf cyg_buf, int cyg_val)
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71 {
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72 CYG_REPORT_FUNCNAME( "longjmp" );
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73 CYG_REPORT_FUNCARG2( "&cyg_buf=%08x, cyg_val=%d", &cyg_buf, cyg_val );
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74
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75 // ANSI says that if we are passed cyg_val==0, then we change it to 1
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76 if (cyg_val == 0)
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77 ++cyg_val;
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78
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79 // we let the HAL do the work
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80
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81 HAL_REORDER_BARRIER(); // prevent any chance of optimisation re-ordering
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82 hal_longjmp( cyg_buf, cyg_val );
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83 HAL_REORDER_BARRIER(); // prevent any chance of optimisation re-ordering
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84
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85 #ifdef CYGDBG_USE_ASSERTS
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86 CYG_ASSERT( 0, "longjmp should not have reached this point!" );
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87 #else
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88 for (;;)
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89 CYG_EMPTY_STATEMENT;
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90 #endif
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91 } // longjmp()
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92
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93 // EOF longjmp.cxx