| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <block-client/cpp/block-group-registry.h> |
| |
| #include <pthread.h> |
| |
| #include <fbl/auto_lock.h> |
| #include <zircon/assert.h> |
| |
| namespace block_client { |
| |
| groupid_t BlockGroupRegistry::GroupID() { |
| fbl::AutoLock lock(&lock_); |
| auto tid = pthread_self(); |
| for (groupid_t i = 0; i < threads_.size(); i++) { |
| if (threads_[i]) { |
| if (pthread_equal(threads_[i].value(), tid)) { |
| return i; |
| } |
| } else { |
| threads_[i] = tid; |
| return i; |
| } |
| } |
| ZX_ASSERT_MSG(false, "Too many threads accessing block device"); |
| } |
| |
| } // namespace block_client |
