@Override
public long allocatePages(long pageCount) throws IOException {
if (pageCount <= 0) {
return 0;
}
Stats stats = new Stats();
mPageManager.addTo(stats);
pageCount -= stats.freePages;
if (pageCount <= 0) {
return 0;
}
for (int i = 0; i < pageCount; i++) {
CommitLock.Shared shared = mCommitLock.acquireShared();
try {
mPageManager.allocAndRecyclePage();
} catch (Throwable e) {
throw closeOnFailure(e);
} finally {
shared.release();
}
}
return pageCount;
}
