[1be3fad] | 1 | /** |
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| 2 | * @file |
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| 3 | * |
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| 4 | * @brief Removes Routine from Top of Calling Thread's stack and Invoke it |
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[5cb175bb] | 5 | * @ingroup POSIXAPI |
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[1be3fad] | 6 | */ |
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| 7 | |
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[db7f70a] | 8 | /* |
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[c3925db] | 9 | * COPYRIGHT (c) 1989-2008. |
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[feaa007] | 10 | * On-Line Applications Research Corporation (OAR). |
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| 11 | * |
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| 12 | * The license and distribution terms for this file may be |
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| 13 | * found in the file LICENSE in this distribution or at |
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| 14 | * http://www.rtems.com/license/LICENSE. |
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[db7f70a] | 15 | */ |
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| 16 | |
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[f42b726] | 17 | #if HAVE_CONFIG_H |
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| 18 | #include "config.h" |
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| 19 | #endif |
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| 20 | |
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[db7f70a] | 21 | #include <pthread.h> |
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| 22 | |
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[927a0a1] | 23 | #include <rtems/score/thread.h> |
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| 24 | #include <rtems/score/threaddispatch.h> |
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| 25 | #include <rtems/posix/threadsup.h> |
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| 26 | |
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| 27 | #ifndef HAVE_STRUCT__PTHREAD_CLEANUP_CONTEXT |
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| 28 | |
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[be1b8a7] | 29 | #include <rtems/score/chainimpl.h> |
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[db7f70a] | 30 | #include <rtems/score/isr.h> |
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| 31 | #include <rtems/score/wkspace.h> |
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| 32 | #include <rtems/posix/cancel.h> |
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[0c5317d] | 33 | #include <rtems/posix/pthreadimpl.h> |
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[db7f70a] | 34 | |
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[64adc13] | 35 | /* |
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[db7f70a] | 36 | * 18.2.3.1 Establishing Cancellation Handlers, P1003.1c/Draft 10, p. 184 |
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| 37 | */ |
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| 38 | |
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| 39 | void pthread_cleanup_pop( |
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| 40 | int execute |
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| 41 | ) |
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| 42 | { |
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| 43 | POSIX_Cancel_Handler_control *handler; |
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[17f1ffb] | 44 | POSIX_Cancel_Handler_control tmp_handler; |
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[db7f70a] | 45 | Chain_Control *handler_stack; |
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| 46 | POSIX_API_Control *thread_support; |
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| 47 | ISR_Level level; |
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[874297f3] | 48 | |
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[db7f70a] | 49 | thread_support = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ]; |
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[874297f3] | 50 | |
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[db7f70a] | 51 | handler_stack = &thread_support->Cancellation_Handlers; |
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| 52 | |
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[c3925db] | 53 | /* |
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| 54 | * We need interrupts disabled to safely check the chain and pull |
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| 55 | * the last element off. But we also need dispatching disabled to |
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| 56 | * ensure that we do not get prempted and deleted while we are holding |
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| 57 | * memory that needs to be freed. |
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| 58 | */ |
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| 59 | |
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| 60 | _Thread_Disable_dispatch(); |
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[db7f70a] | 61 | _ISR_Disable( level ); |
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[c3925db] | 62 | |
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[17f1ffb] | 63 | if ( _Chain_Is_empty( handler_stack ) ) { |
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[c3925db] | 64 | _Thread_Enable_dispatch(); |
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[17f1ffb] | 65 | _ISR_Enable( level ); |
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| 66 | return; |
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| 67 | } |
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[874297f3] | 68 | |
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| 69 | handler = (POSIX_Cancel_Handler_control *) |
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[e5b78e2] | 70 | _Chain_Tail( handler_stack )->previous; |
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[db7f70a] | 71 | _Chain_Extract_unprotected( &handler->Node ); |
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[874297f3] | 72 | |
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[db7f70a] | 73 | _ISR_Enable( level ); |
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| 74 | |
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[17f1ffb] | 75 | tmp_handler = *handler; |
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| 76 | |
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[c3925db] | 77 | _Workspace_Free( handler ); |
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| 78 | |
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[17f1ffb] | 79 | _Thread_Enable_dispatch(); |
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| 80 | |
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[db7f70a] | 81 | if ( execute ) |
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[17f1ffb] | 82 | (*tmp_handler.routine)( tmp_handler.arg ); |
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[db7f70a] | 83 | } |
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[927a0a1] | 84 | |
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| 85 | #else /* HAVE_STRUCT__PTHREAD_CLEANUP_CONTEXT */ |
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| 86 | |
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| 87 | void _pthread_cleanup_pop( |
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| 88 | struct _pthread_cleanup_context *context, |
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| 89 | int execute |
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| 90 | ) |
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| 91 | { |
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| 92 | POSIX_API_Control *thread_support; |
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| 93 | |
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| 94 | if ( execute != 0 ) { |
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| 95 | ( *context->_routine )( context->_arg ); |
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| 96 | } |
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| 97 | |
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| 98 | _Thread_Disable_dispatch(); |
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| 99 | |
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| 100 | thread_support = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ]; |
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| 101 | thread_support->last_cleanup_context = context->_previous; |
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| 102 | |
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| 103 | _Thread_Enable_dispatch(); |
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| 104 | } |
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| 105 | |
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| 106 | #endif /* HAVE_STRUCT__PTHREAD_CLEANUP_CONTEXT */ |
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