FreeCalypso > hg > fc-tourmaline
view src/nucleus/mb_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 */ /* */ /* mb_extr.h Nucleus PLUS 1.14 */ /* */ /* COMPONENT */ /* */ /* MB - Mailbox Management */ /* */ /* DESCRIPTION */ /* */ /* This file contains function prototypes of all functions */ /* accessible to other components. */ /* */ /* DATA STRUCTURES */ /* */ /* None */ /* */ /* FUNCTIONS */ /* */ /* None */ /* */ /* DEPENDENCIES */ /* */ /* mb_defs.h Mailbox Management constants */ /* */ /* 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, */ /* changed the names of several */ /* mailboxes services to reflect */ /* the new file structure, */ /* modified function interface to */ /* exactly match the prototype, */ /* 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 "mb_defs.h" /* Include MB constants */ /* Check to see if the file has been included already. */ #ifndef MB_EXTR #define MB_EXTR /* Initialization functions. */ VOID MBI_Initialize(VOID); /* Core error checking functions. */ STATUS MBCE_Create_Mailbox(NU_MAILBOX *mailbox_ptr, CHAR *name, OPTION suspend_type); STATUS MBCE_Delete_Mailbox(NU_MAILBOX *mailbox_ptr); STATUS MBCE_Send_To_Mailbox(NU_MAILBOX *mailbox_ptr, VOID *message, UNSIGNED suspend); STATUS MBCE_Receive_From_Mailbox(NU_MAILBOX *mailbox_ptr, VOID *message, UNSIGNED suspend); /* Supplemental error checking functions. */ STATUS MBSE_Reset_Mailbox(NU_MAILBOX *mailbox_ptr); STATUS MBSE_Broadcast_To_Mailbox(NU_MAILBOX *mailbox_ptr, VOID *message, UNSIGNED suspend); /* Core processing functions. */ STATUS MBC_Create_Mailbox(NU_MAILBOX *mailbox_ptr, CHAR *name, OPTION suspend_type); STATUS MBC_Delete_Mailbox(NU_MAILBOX *mailbox_ptr); STATUS MBC_Send_To_Mailbox(NU_MAILBOX *mailbox_ptr, VOID *message, UNSIGNED suspend); STATUS MBC_Receive_From_Mailbox(NU_MAILBOX *mailbox_ptr, VOID *message, UNSIGNED suspend); /* Supplemental mailbox functions. */ STATUS MBS_Reset_Mailbox(NU_MAILBOX *mailbox_ptr); STATUS MBS_Broadcast_To_Mailbox(NU_MAILBOX *mailbox_ptr, VOID *message, UNSIGNED suspend); /* Mailbox fact retrieval functions. */ UNSIGNED MBF_Established_Mailboxes(VOID); STATUS MBF_Mailbox_Information(NU_MAILBOX *mailbox_ptr, CHAR *name, OPTION *suspend_type, DATA_ELEMENT *message_present, UNSIGNED *tasks_waiting, NU_TASK **first_task); UNSIGNED MBF_Mailbox_Pointers(NU_MAILBOX **pointer_list, UNSIGNED maximum_pointers); #endif