C++ (Cpp) skynet_context_grab示例

示例#1

文件： skynet_handle.c 项目： EtcDot/skynet

// 通过handle获取skynet_context, skynet_context的引用计数加1
struct skynet_context * 
skynet_handle_grab(uint32_t handle) {
	struct handle_storage *s = H;
	struct skynet_context * result = NULL;

	rwlock_rlock(&s->lock);

	uint32_t hash = handle & (s->slot_size-1);
	struct skynet_context * ctx = s->slot[hash];
	if (ctx && skynet_context_handle(ctx) == handle) {
		result = ctx;
		skynet_context_grab(result); // 	__sync_add_and_fetch(&ctx->ref,1);	skynet_context引用计数加1
	}

	rwlock_runlock(&s->lock);

	return result;
}

示例#2

文件： skynet_handle.c 项目： KAndQ/skynet

struct skynet_context * 
skynet_handle_grab(uint32_t handle) {
	struct handle_storage *s = H;
	struct skynet_context * result = NULL;

	// 保证线程安全
	rwlock_rlock(&s->lock);
	
	uint32_t hash = handle & (s->slot_size - 1);
	struct skynet_context * ctx = s->slot[hash];
	if (ctx 
	// 1. 判断是否在同一个节点
	// 2. 确认 handle 是没有超出 slot_size 的, 因为可能 slot_size = 8, handle = 15, skynet_context_handle(ctx) = 7
	// 3. 其他线程没有修改 ctx
	&& skynet_context_handle(ctx) == handle) {
		result = ctx;
		skynet_context_grab(result);
	}

	rwlock_runlock(&s->lock);

	return result;
}