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vfs/ram: avoid 2x mutex releases in guard

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Issue #3612
This commit is contained in:
Alexander Boettcher 2020-04-01 15:45:12 +02:00 committed by Christian Helmuth
parent 2b41323fe6
commit 13cd25e7b0
1 changed files with 5 additions and 2 deletions
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7
repos/os/src/lib/vfs/ram_file_system.h
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@ -244,10 +244,11 @@ class Vfs_ram::Node : private Genode::Avl_node<Node>, private Genode::Mutex
struct Guard
{
Node &node;
bool release { true };
Guard(Node *guard_node) : node(*guard_node) { node.acquire(); }
~Guard() { node.release(); }
~Guard() { if (release) node.release(); }
};
};
@ -837,8 +838,10 @@ class Vfs::Ram_file_system : public Vfs::File_system
if (!to_dir) return RENAME_ERR_NO_ENTRY;
/* unlock the node so a second guard can be constructed */
if (from_dir == to_dir)
if (from_dir == to_dir) {
from_dir->Node::release();
from_guard.release = false;
}
Node::Guard to_guard(to_dir);