Acquire a lock for the file with the specified descriptor.
Declared in <bdls_filesystemutil.h>
static
int
lock(
FileDescriptor descriptor,
bool lockWriteFlag);If lockWriteFlag is true, acquire an exclusive write lock; otherwise acquire a (possibly) shared read lock. The calling thread will block until the lock is acquired. Return 0 on success, and a non-zero value otherwise. Note that this operation locks the indicated file for use by the current process, but the behavior is unspecified (and platform-dependent) when either attempting to lock descriptor multiple times, or attempting to lock another descriptor referring to the same file, within a single process.
0 on success, and a non-zero value otherwise
| Name | Description |
|---|---|
| descriptor | file descriptor of the file to lock |
| lockWriteFlag | true for an exclusive write lock; false for a shared read lock |