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Added cache for parsers

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This commit is contained in:
snake-4
2024-04-27 16:56:50 +02:00
parent 8c4fbcc207
commit e431fc2c6a
8 changed files with 76 additions and 56 deletions
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31
module/jni/mountinfo_parser.cpp
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@@ -34,15 +34,20 @@ const std::string &mountinfo_entry_t::getFilesystemType() const { return filesys
const std::string &mountinfo_entry_t::getMountSource() const { return mount_source; }
const std::unordered_map<std::string, std::string> &mountinfo_entry_t::getSuperOptions() const { return super_options; }
std::vector<mountinfo_entry_t> parseMountinfosFromPath(const char *path)
const std::vector<mountinfo_entry_t> &parseSelfMountinfo(bool cached)
{
std::vector<mountinfo_entry_t> ret;
static std::vector<mountinfo_entry_t> parser_cache;
if (cached && !parser_cache.empty())
{
return parser_cache;
}
parser_cache.clear();
std::ifstream ifs(path, std::ifstream::in);
std::ifstream ifs("/proc/self/mountinfo", std::ifstream::in);
if (!ifs)
{
LOGE("parseMountinfosFromPath could not open file \"%s\"", path);
return ret;
LOGE("parseSelfMountinfo could not open /proc/self/mountinfo");
return parser_cache;
}
for (std::string line; std::getline(ifs, line);)
@@ -57,7 +62,7 @@ std::vector<mountinfo_entry_t> parseMountinfosFromPath(const char *path)
iss >> mount_id >> parent_id >> major >> colon >> minor >> root >> mount_point >> mount_options;
if (iss.fail())
{
LOGE("parseMountinfosFromPath failed to parse the first 6 fields of line: %s", line.c_str());
LOGE("parseSelfMountinfo failed to parse the first 6 fields of line: %s", line.c_str());
continue;
}
@@ -69,22 +74,22 @@ std::vector<mountinfo_entry_t> parseMountinfosFromPath(const char *path)
if (iss.fail())
{
LOGE("parseMountinfosFromPath failed to parse the optional fields of line: %s", line.c_str());
LOGE("parseSelfMountinfo failed to parse the optional fields of line: %s", line.c_str());
continue;
}
iss >> filesystem_type >> mount_source >> super_options;
if (iss.fail())
{
LOGE("parseMountinfosFromPath failed to parse the last 3 fields of line: %s", line.c_str());
LOGE("parseSelfMountinfo failed to parse the last 3 fields of line: %s", line.c_str());
continue;
}
ret.emplace_back(mountinfo_entry_t(mount_id, parent_id, major, minor,
root, mount_point, mount_options,
optional_fields, filesystem_type, mount_source,
super_options));
parser_cache.emplace_back(mountinfo_entry_t(mount_id, parent_id, major, minor,
root, mount_point, mount_options,
optional_fields, filesystem_type, mount_source,
super_options));
}
return ret;
return parser_cache;
}