duk_hthread_misc.c File Reference

#include "duk_internal.h"

Go to the source code of this file.

Functions
DUK_INTERNAL void	duk_hthread_terminate (duk_hthread *thr)
DUK_INTERNAL duk_activation *	duk_hthread_get_current_activation (duk_hthread *thr)
DUK_INTERNAL duk_uint_fast32_t	duk_hthread_get_act_prev_pc (duk_hthread *thr, duk_activation *act)
DUK_INTERNAL void	duk_hthread_sync_currpc (duk_hthread *thr)
DUK_INTERNAL void	duk_hthread_sync_and_null_currpc (duk_hthread *thr)

Function Documentation

duk_hthread_get_act_prev_pc()

DUK_INTERNAL duk_uint_fast32_t duk_hthread_get_act_prev_pc	(	duk_hthread *	thr,
		duk_activation *	act )

Definition at line 63 of file duktape-1.5.2/src-separate/duk_hthread_misc.c.

                                                                                                  {
    duk_instr_t *bcode;
    duk_uint_fast32_t ret;
 
    DUK_ASSERT(thr != NULL);
    DUK_ASSERT(act != NULL);
    DUK_UNREF(thr);
 
    if (act->func && DUK_HOBJECT_IS_COMPILEDFUNCTION(act->func)) {
        bcode = DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, (duk_hcompiledfunction *) (act->func));
        ret = (duk_uint_fast32_t) (act->curr_pc - bcode);
        if (ret > 0) {
            ret--;
        }
        return ret;
    }
    return 0;
}

References duk_activation::curr_pc, DUK_ASSERT, DUK_HCOMPILEDFUNCTION_GET_CODE_BASE, DUK_HOBJECT_IS_COMPILEDFUNCTION, DUK_UNREF, duk_activation::func, duk_hthread::heap, and NULL.

duk_hthread_get_current_activation()

DUK_INTERNAL duk_activation * duk_hthread_get_current_activation

(

duk_hthread *

thr

)

Definition at line 36 of file duktape-1.5.2/src-separate/duk_hthread_misc.c.

                                                                                  {
    DUK_ASSERT(thr != NULL);
 
    if (thr->callstack_top > 0) {
        return thr->callstack + thr->callstack_top - 1;
    } else {
        return NULL;
    }
}

References duk_hthread::callstack, duk_hthread::callstack_top, DUK_ASSERT, and NULL.

duk_hthread_sync_and_null_currpc()

DUK_INTERNAL void duk_hthread_sync_and_null_currpc

(

duk_hthread *

thr

)

Definition at line 96 of file duktape-1.5.2/src-separate/duk_hthread_misc.c.

                                                                     {
    duk_activation *act;
 
    DUK_ASSERT(thr != NULL);
 
    if (thr->ptr_curr_pc != NULL) {
        /* ptr_curr_pc != NULL only when bytecode executor is active. */
        DUK_ASSERT(thr->callstack_top > 0);
        act = thr->callstack + thr->callstack_top - 1;
        act->curr_pc = *thr->ptr_curr_pc;
        thr->ptr_curr_pc = NULL;
    }
}

References duk_hthread::callstack, duk_hthread::callstack_top, duk_activation::curr_pc, DUK_ASSERT, NULL, and duk_hthread::ptr_curr_pc.

duk_hthread_sync_currpc()

DUK_INTERNAL void duk_hthread_sync_currpc

(

duk_hthread *

thr

)

Definition at line 83 of file duktape-1.5.2/src-separate/duk_hthread_misc.c.

                                                            {
    duk_activation *act;
 
    DUK_ASSERT(thr != NULL);
 
    if (thr->ptr_curr_pc != NULL) {
        /* ptr_curr_pc != NULL only when bytecode executor is active. */
        DUK_ASSERT(thr->callstack_top > 0);
        act = thr->callstack + thr->callstack_top - 1;
        act->curr_pc = *thr->ptr_curr_pc;
    }
}

References duk_hthread::callstack, duk_hthread::callstack_top, duk_activation::curr_pc, DUK_ASSERT, NULL, and duk_hthread::ptr_curr_pc.

duk_hthread_terminate()

DUK_INTERNAL void duk_hthread_terminate

(

duk_hthread *

thr

)

Definition at line 7 of file duktape-1.5.2/src-separate/duk_hthread_misc.c.

                                                          {
    DUK_ASSERT(thr != NULL);
 
    /* Order of unwinding is important */
 
    duk_hthread_catchstack_unwind(thr, 0);
 
    duk_hthread_callstack_unwind(thr, 0);  /* side effects, possibly errors */
 
    thr->valstack_bottom = thr->valstack;
    duk_set_top((duk_context *) thr, 0);  /* unwinds valstack, updating refcounts */
 
    thr->state = DUK_HTHREAD_STATE_TERMINATED;
 
    /* Here we could remove references to built-ins, but it may not be
     * worth the effort because built-ins are quite likely to be shared
     * with another (unterminated) thread, and terminated threads are also
     * usually garbage collected quite quickly.  Also, doing DECREFs
     * could trigger finalization, which would run on the current thread
     * and have access to only some of the built-ins.  Garbage collection
     * deals with this correctly already.
     */
 
    /* XXX: Shrink the stacks to minimize memory usage?  May not
     * be worth the effort because terminated threads are usually
     * garbage collected quite soon.
     */
}

References DUK_ASSERT, duk_hthread_callstack_unwind(), duk_hthread_catchstack_unwind(), DUK_HTHREAD_STATE_TERMINATED, duk_set_top(), NULL, duk_hthread::state, duk_hthread::valstack, and duk_hthread::valstack_bottom.