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Annotation of researchv10no/cmd/cfront/libC/otask/obj.c, revision 1.1

1.1     ! root        1: #include "task.h"
        !             2: 
        !             3: object::~object()
        !             4: {
        !             5:        if (o_link) task_error(E_OLINK);
        !             6:        if (o_next) task_error(E_ONEXT);
        !             7: } /* delete */
        !             8: 
        !             9: /*     note that a task can be on a chain in several places
        !            10: */
        !            11: 
        !            12: /* object::remember() ... */
        !            13: 
        !            14: void
        !            15: object::forget(register task* p)
        !            16: /* remove all occurrences of task* p from this object's task list */
        !            17: {
        !            18:        register olink* ll;
        !            19:        register olink* l;
        !            20: 
        !            21:        if (o_link == 0) return;
        !            22: 
        !            23:        while (o_link->l_task == p) {
        !            24:                ll = o_link;
        !            25:                o_link = ll->l_next;
        !            26:                delete ll;
        !            27:                if (o_link == 0) return;
        !            28:        };
        !            29: 
        !            30:        l = o_link;
        !            31:        while (ll = l->l_next) {
        !            32:                if (ll->l_task == p) {
        !            33:                        l->l_next = ll->l_next;
        !            34:                        delete ll;
        !            35:                }
        !            36:                else l = ll;
        !            37:        };
        !            38: }
        !            39: 
        !            40: 
        !            41: /*
        !            42:  * prepare IDLE tasks on this object for scheduling
        !            43:  * also flush the remember chain
        !            44:  */
        !            45: void
        !            46: object::alert()
        !            47: {
        !            48:        register olink* l;
        !            49:        register olink* ll;
        !            50: 
        !            51:        for (l=o_link; ll = l; l=l->l_next, delete ll) {
        !            52:                register task* p = l->l_task;
        !            53:                if (p->s_state == IDLE) p->insert(0,this);
        !            54:        }
        !            55:        o_link = 0;
        !            56: }
        !            57: 
        !            58: /*
        !            59:  * virtual int object::pending() returns 1 if the object should be waited for.
        !            60:  * By default say yes and assume that alert() will be called somehow.
        !            61:  */
        !            62: int
        !            63: object::pending()
        !            64: {
        !            65:        return 1;
        !            66: }
        !            67: 
        !            68: /*
        !            69:  * object::print() is a virtual function.  In each derived class, derived::print()
        !            70:  * will print the derived information, then call its immediate base::print(), with
        !            71:  * second argument non-zero.  The original virtual call will have the second
        !            72:  * argument 0.
        !            73:  */
        !            74: void
        !            75: object::print(int n, int baseClass)
        !            76: {
        !            77:        if (!baseClass)
        !            78:                printf("Unidentified object ");
        !            79: 
        !            80:        if (n&VERBOSE) {
        !            81:                olink* l;
        !            82:                printf("this=%d, remember_chain:\n", this);
        !            83:                for (l=o_link; l; l=l->l_next) l->l_task->print(n & ~CHAIN);
        !            84:        }
        !            85: 
        !            86:        if (n&CHAIN) {
        !            87:                if (o_next) o_next->print(n);
        !            88:        }
        !            89:        printf("\n");
        !            90: }
        !            91: 
        !            92: int
        !            93: object::o_type()
        !            94: {
        !            95:        return OBJECT;
        !            96: }
        !            97: 
        !            98: #define macro_start static char* error_name[] = {
        !            99: #define macro(num,name,string) string,
        !           100: #define macro_end(last_name) };
        !           101: task_error_messages
        !           102: #undef macro_start
        !           103: #undef macro
        !           104: #undef macro_end
        !           105: 
        !           106: static int in_error = 0;
        !           107: 
        !           108: static void
        !           109: print_error(int n)
        !           110: {
        !           111: 
        !           112:        register i = (n<1 || MAXERR<n) ? 0 : n;
        !           113: 
        !           114:        printf("\n\n***** task_error(%d) %s\n",n,error_name[i]);
        !           115: 
        !           116:        if (((object*)0)->this_task()) { 
        !           117:                printf("thistask: ");
        !           118:                thistask->print(VERBOSE|STACK);
        !           119:        }
        !           120:        if (sched::runchain) {
        !           121:                printf("run_chain:\n");
        !           122:                sched::runchain->print(CHAIN);
        !           123:        }
        !           124: } /* task_error */
        !           125: 
        !           126: int
        !           127: object::task_error(int n)
        !           128: {
        !           129:        if (in_error)
        !           130:                exit(in_error);
        !           131:        else
        !           132:                in_error = n;
        !           133: 
        !           134:        if (error_fct) {
        !           135:                n = (*error_fct)(n,this);
        !           136:                if (n) exit(n);
        !           137:        }
        !           138:        else {
        !           139:                print_error(n);
        !           140:                exit(n);
        !           141:        }
        !           142:        in_error = 0;
        !           143:        return 0;
        !           144: }

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