FreeCalypso > hg > fc-tourmaline
view src/nucleus/ev_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 |
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/*************************************************************************/ /* */ /* 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 */ /* */ /* ev_extr.h Nucleus PLUS 1.14 */ /* */ /* COMPONENT */ /* */ /* EV - Event Group Management */ /* */ /* DESCRIPTION */ /* */ /* This file contains function prototypes of all functions */ /* accessible to other components. */ /* */ /* DATA STRUCTURES */ /* */ /* None */ /* */ /* FUNCTIONS */ /* */ /* None */ /* */ /* DEPENDENCIES */ /* */ /* ev_defs.h Event Flag management consts */ /* */ /* 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 "ev_defs.h" /* Include EV constants */ /* Check to see if the file has been included already. */ #ifndef EV_EXTR #define EV_EXTR /* Initialization functions. */ VOID EVI_Initialize(VOID); /* Error checking functions. */ STATUS EVCE_Create_Event_Group(NU_EVENT_GROUP *group_ptr, CHAR *name); STATUS EVCE_Delete_Event_Group(NU_EVENT_GROUP *group_ptr); STATUS EVCE_Set_Events(NU_EVENT_GROUP *group_ptr, UNSIGNED events, OPTION operation); STATUS EVCE_Retrieve_Events(NU_EVENT_GROUP *group_ptr, UNSIGNED requested_flags, OPTION operation, UNSIGNED *retrieved_flags, UNSIGNED suspend); /* Core processing functions. */ STATUS EVC_Create_Event_Group(NU_EVENT_GROUP *group_ptr, CHAR *name); STATUS EVC_Delete_Event_Group(NU_EVENT_GROUP *group_ptr); STATUS EVC_Set_Events(NU_EVENT_GROUP *group_ptr, UNSIGNED events, OPTION operation); STATUS EVC_Retrieve_Events(NU_EVENT_GROUP *group_ptr, UNSIGNED requested_flags, OPTION operation, UNSIGNED *retrieved_flags, UNSIGNED suspend); /* Information retrieval functions. */ UNSIGNED EVF_Established_Event_Groups(VOID); STATUS EVF_Event_Group_Information(NU_EVENT_GROUP *group_ptr, CHAR *name, UNSIGNED *event_flags, UNSIGNED *tasks_waiting, NU_TASK **first_task); UNSIGNED EVF_Event_Group_Pointers(NU_EVENT_GROUP **pointer_list, UNSIGNED maximum_pointers); #endif