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fs: use Spanner to refer to ioctl arg buffer instead of making vector copies

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This avoids some allocations and copying.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell
2020-11-05 00:40:54 -05:00
parent 333aea9822
commit c0149d72b7
2 changed files with 11 additions and 9 deletions
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4
include/crucible/fs.h
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@ -2,6 +2,7 @@
#define CRUCIBLE_FS_H
#include "crucible/error.h"
#include "crucible/spanner.h"
// Terribly Linux-specific FS-wrangling functions
@ -164,7 +165,7 @@ namespace crucible {
struct BtrfsIoctlSearchHeader : public btrfs_ioctl_search_header {
BtrfsIoctlSearchHeader();
vector<uint8_t> m_data;
Spanner<const uint8_t> m_data;
size_t set_data(const vector<uint8_t> &v, size_t offset);
bool operator<(const BtrfsIoctlSearchHeader &that) const;
};
@ -187,6 +188,7 @@ namespace crucible {
void next_min(const BtrfsIoctlSearchHeader& ref);
size_t m_buf_size;
vector<uint8_t> m_ioctl_arg;
set<BtrfsIoctlSearchHeader> m_result;
};