FreeCalypso > hg > fc-tourmaline
view src/nucleus/sm_extr.h @ 268:f2e52cab0a73
abb_inth.c: check all interrupt causes, not just one
The original code used if - else if - else if etc constructs, thus
the first detected interrupt was the only one handled. However,
Iota ITSTATREG is a clear-on-read register, thus if we only handle
the first detected interrupt and skip checking the others, then the
other interrupts will be lost, if more than one interrupt happened
to occur in one ABB interrupt handling cycle - a form of rare race
condition. Change the code to check all interrupts that were read
in this cycle.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sun, 13 Jun 2021 18:17:53 +0000 |
| parents | 4e78acac3d88 |
| children |
line wrap: on
line source
/*************************************************************************/ /* */ /* Copyright Mentor Graphics Corporation 2002 */ /* All Rights Reserved. */ /* */ /* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */ /* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */ /* SUBJECT TO LICENSE TERMS. */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* FILE NAME VERSION */ /* */ /* sm_extr.h Nucleus PLUS 1.14 */ /* */ /* COMPONENT */ /* */ /* SM - Semaphore Management */ /* */ /* DESCRIPTION */ /* */ /* This file contains function prototypes of all functions */ /* accessible to other components. */ /* */ /* DATA STRUCTURES */ /* */ /* None */ /* */ /* FUNCTIONS */ /* */ /* None */ /* */ /* DEPENDENCIES */ /* */ /* sm_defs.h Semaphore Management constant*/ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1993 Created initial version 1.0 */ /* 04-19-1993 Verified version 1.0 */ /* 03-01-1994 Moved include files outside of */ /* the file #ifndef to allow the */ /* use of actual data structures, */ /* modified function prototypes, */ /* resulting in version 1.1 */ /* */ /* 03-18-1994 Verified version 1.1 */ /* 04-17-1996 updated to version 1.2 */ /* 03-24-1998 Released version 1.3 */ /* 03-26-1999 Released 1.11m (new release */ /* numbering scheme) */ /* 04-17-2002 Released version 1.13m */ /* 11-07-2002 Released version 1.14 */ /*************************************************************************/ #include "sm_defs.h" /* Include SM constants */ /* Check to see if the file has been included already. */ #ifndef SM_EXTR #define SM_EXTR /* Initialization functions. */ VOID SMI_Initialize(VOID); /* Error checking core functions. */ STATUS SMCE_Create_Semaphore(NU_SEMAPHORE *semaphore_ptr, CHAR *name, UNSIGNED initial_count, OPTION suspend_type); STATUS SMCE_Delete_Semaphore(NU_SEMAPHORE *semaphore_ptr); STATUS SMCE_Obtain_Semaphore(NU_SEMAPHORE *semaphore_ptr, UNSIGNED suspend); STATUS SMCE_Release_Semaphore(NU_SEMAPHORE *semaphore_ptr); /* Error checking supplemental functions. */ STATUS SMSE_Reset_Semaphore(NU_SEMAPHORE *semaphore_ptr, UNSIGNED initial_count); /* Core processing functions. */ STATUS SMC_Create_Semaphore(NU_SEMAPHORE *semaphore_ptr, CHAR *name, UNSIGNED initial_count, OPTION suspend_type); STATUS SMC_Delete_Semaphore(NU_SEMAPHORE *semaphore_ptr); STATUS SMC_Obtain_Semaphore(NU_SEMAPHORE *semaphore_ptr, UNSIGNED suspend); STATUS SMC_Release_Semaphore(NU_SEMAPHORE *semaphore_ptr); /* Supplemental processing functions. */ STATUS SMS_Reset_Semaphore(NU_SEMAPHORE *semaphore_ptr, UNSIGNED initial_count); /* Information retrieval functions. */ UNSIGNED SMF_Established_Semaphores(VOID); STATUS SMF_Semaphore_Information(NU_SEMAPHORE *semaphore_ptr, CHAR *name, UNSIGNED *current_count, OPTION *suspend_type, UNSIGNED *tasks_waiting, NU_TASK **first_task); UNSIGNED SMF_Semaphore_Pointers(NU_SEMAPHORE **pointer_list, UNSIGNED maximum_pointers); #endif