diff options
Diffstat (limited to 'doc/index.html')
| -rw-r--r-- | doc/index.html | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/doc/index.html b/doc/index.html index c2312b7..58442e8 100644 --- a/doc/index.html +++ b/doc/index.html @@ -141,10 +141,18 @@ the batch. <p> <h1>Concurrency</h1> <p> -A database may only be opened by one process at a time. The <code>leveldb</code> -implementation acquires a lock from the operating system to prevent -misuse. Within a single process, the same <code>leveldb::DB</code> object may -be safely used by multiple concurrent threads. +A database may only be opened by one process at a time. +The <code>leveldb</code> implementation acquires a lock from the +operating system to prevent misuse. Within a single process, the +same <code>leveldb::DB</code> object may be safely shared by multiple +concurrent threads. I.e., different threads may write into or fetch +iterators or call <code>Get</code> on the same database without any +external synchronization (the leveldb implementation will +automatically do the required synchronization). However other objects +(like Iterator and WriteBatch) may require external synchronization. +If two threads share such an object, they must protect access to it +using their own locking protocol. More details are available in +the public header files. <p> <h1>Iteration</h1> <p> |