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simplified SemaphoreGroup by switching a semaphore array to a semaphore list.

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added some copy methods to Array
This commit is contained in:
hyunghwan.chung
2017-10-08 15:40:32 +00:00
parent 1fd9ce285c
commit 32a77bc6db
6 changed files with 206 additions and 98 deletions
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19
moo/lib/comp.c
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@ -5531,22 +5531,35 @@ static int compile_while_expression (moo_t* moo) /* or compile_until_expression
postcondpos = moo->c->mth.code.len;
if (precondpos + 1 == postcondpos)
{
moo_uint8_t inst1, inst2;
if (is_until_loop)
{
inst1 = BCODE_PUSH_FALSE;
inst2 = BCODE_PUSH_TRUE;
}
else
{
inst1 = BCODE_PUSH_TRUE;
inst2 = BCODE_PUSH_FALSE;
}
/* simple optimization -
* if the conditional is known to be true, emit the absolute jump instruction.
* if it is known to be false, kill all generated instructions. */
if (moo->c->mth.code.ptr[precondpos] == (is_until_loop? BCODE_PUSH_FALSE: BCODE_PUSH_TRUE))
if (moo->c->mth.code.ptr[precondpos] == inst1)
{
/* the conditional is always true for while, or false for until*/
cond_style = 1;
eliminate_instructions (moo, precondpos, moo->c->mth.code.len - 1);
postcondpos = precondpos;
}
else if (moo->c->mth.code.ptr[precondpos] == (is_until_loop? BCODE_PUSH_TRUE: BCODE_PUSH_FALSE))
else if (moo->c->mth.code.ptr[precondpos] == inst2)
{
/* the conditional is always false for while, or false for until */
cond_style = -1;
}
/* TODO: at least check for some literals for optimization.
/* TODO: at least check some other literals for optimization.
* most literal values must be evaluate to true. */
}