Function co_create_env

co_routine.cpp:461–519

struct stCoRoutine_t *co_create_env( stCoRoutineEnv_t * env, const stCoRoutineAttr_t* attr,
		pfn_co_routine_t pfn,void *arg )
{

	stCoRoutineAttr_t at;
	if( attr )
	{
		memcpy( &at,attr,sizeof(at) );
	}
	if( at.stack_size <= 0 )
	{
		at.stack_size = 128 * 1024;
	}
	else if( at.stack_size > 1024 * 1024 * 8 )
	{
		at.stack_size = 1024 * 1024 * 8;
	}

	if( at.stack_size & 0xFFF ) 
	{
		at.stack_size &= ~0xFFF;
		at.stack_size += 0x1000;
	}

	stCoRoutine_t *lp = (stCoRoutine_t*)malloc( sizeof(stCoRoutine_t) );
	
	memset( lp,0,(long)(sizeof(stCoRoutine_t))); 


	lp->env = env;
	lp->pfn = pfn;
	lp->arg = arg;

	stStackMem_t* stack_mem = NULL;
	if( at.share_stack )
	{
		stack_mem = co_get_stackmem( at.share_stack);
		at.stack_size = at.share_stack->stack_size;
	}
	else
	{
		stack_mem = co_alloc_stackmem(at.stack_size);
	}
	lp->stack_mem = stack_mem;

	lp->ctx.ss_sp = stack_mem->stack_buffer;
	lp->ctx.ss_size = at.stack_size;

	lp->cStart = 0;
	lp->cEnd = 0;
	lp->cIsMain = 0;
	lp->cEnableSysHook = 0;
	lp->cIsShareStack = at.share_stack != NULL;

	lp->save_size = 0;
	lp->save_buffer = NULL;

	return lp;