🛠️🐜 Antkeeper superbuild with dependencies included
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570 lines
16 KiB
570 lines
16 KiB
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#include "config.h"
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#include "helpers.h"
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#include <algorithm>
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#include <cerrno>
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#include <cstdarg>
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#include <cstdlib>
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#include <cstdio>
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#include <cstring>
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#include <mutex>
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#include <limits>
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#include <string>
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#include <tuple>
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#include "almalloc.h"
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#include "alfstream.h"
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#include "alnumeric.h"
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#include "aloptional.h"
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#include "alspan.h"
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#include "alstring.h"
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#include "logging.h"
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#include "strutils.h"
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#include "vector.h"
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/* Mixing thread piority level */
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int RTPrioLevel{1};
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/* Allow reducing the process's RTTime limit for RTKit. */
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bool AllowRTTimeLimit{true};
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#ifdef _WIN32
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#include <shlobj.h>
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const PathNamePair &GetProcBinary()
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{
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static al::optional<PathNamePair> procbin;
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if(procbin) return *procbin;
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auto fullpath = al::vector<WCHAR>(256);
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DWORD len{GetModuleFileNameW(nullptr, fullpath.data(), static_cast<DWORD>(fullpath.size()))};
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while(len == fullpath.size())
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{
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fullpath.resize(fullpath.size() << 1);
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len = GetModuleFileNameW(nullptr, fullpath.data(), static_cast<DWORD>(fullpath.size()));
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}
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if(len == 0)
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{
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ERR("Failed to get process name: error %lu\n", GetLastError());
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procbin = al::make_optional<PathNamePair>();
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return *procbin;
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}
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fullpath.resize(len);
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if(fullpath.back() != 0)
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fullpath.push_back(0);
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auto sep = std::find(fullpath.rbegin()+1, fullpath.rend(), '\\');
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sep = std::find(fullpath.rbegin()+1, sep, '/');
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if(sep != fullpath.rend())
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{
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*sep = 0;
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procbin = al::make_optional<PathNamePair>(wstr_to_utf8(fullpath.data()),
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wstr_to_utf8(&*sep + 1));
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}
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else
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procbin = al::make_optional<PathNamePair>(std::string{}, wstr_to_utf8(fullpath.data()));
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TRACE("Got binary: %s, %s\n", procbin->path.c_str(), procbin->fname.c_str());
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return *procbin;
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}
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namespace {
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void DirectorySearch(const char *path, const char *ext, al::vector<std::string> *const results)
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{
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std::string pathstr{path};
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pathstr += "\\*";
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pathstr += ext;
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TRACE("Searching %s\n", pathstr.c_str());
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std::wstring wpath{utf8_to_wstr(pathstr.c_str())};
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WIN32_FIND_DATAW fdata;
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HANDLE hdl{FindFirstFileW(wpath.c_str(), &fdata)};
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if(hdl == INVALID_HANDLE_VALUE) return;
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const auto base = results->size();
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do {
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results->emplace_back();
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std::string &str = results->back();
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str = path;
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str += '\\';
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str += wstr_to_utf8(fdata.cFileName);
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} while(FindNextFileW(hdl, &fdata));
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FindClose(hdl);
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const al::span<std::string> newlist{results->data()+base, results->size()-base};
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std::sort(newlist.begin(), newlist.end());
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for(const auto &name : newlist)
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TRACE(" got %s\n", name.c_str());
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}
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} // namespace
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al::vector<std::string> SearchDataFiles(const char *ext, const char *subdir)
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{
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auto is_slash = [](int c) noexcept -> int { return (c == '\\' || c == '/'); };
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static std::mutex search_lock;
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std::lock_guard<std::mutex> _{search_lock};
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/* If the path is absolute, use it directly. */
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al::vector<std::string> results;
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if(isalpha(subdir[0]) && subdir[1] == ':' && is_slash(subdir[2]))
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{
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std::string path{subdir};
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std::replace(path.begin(), path.end(), '/', '\\');
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DirectorySearch(path.c_str(), ext, &results);
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return results;
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}
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if(subdir[0] == '\\' && subdir[1] == '\\' && subdir[2] == '?' && subdir[3] == '\\')
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{
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DirectorySearch(subdir, ext, &results);
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return results;
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}
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std::string path;
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/* Search the app-local directory. */
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if(auto localpath = al::getenv(L"ALSOFT_LOCAL_PATH"))
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{
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path = wstr_to_utf8(localpath->c_str());
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if(is_slash(path.back()))
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path.pop_back();
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}
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else if(WCHAR *cwdbuf{_wgetcwd(nullptr, 0)})
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{
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path = wstr_to_utf8(cwdbuf);
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if(is_slash(path.back()))
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path.pop_back();
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free(cwdbuf);
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}
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else
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path = ".";
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std::replace(path.begin(), path.end(), '/', '\\');
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DirectorySearch(path.c_str(), ext, &results);
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/* Search the local and global data dirs. */
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static const int ids[2]{ CSIDL_APPDATA, CSIDL_COMMON_APPDATA };
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for(int id : ids)
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{
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WCHAR buffer[MAX_PATH];
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if(SHGetSpecialFolderPathW(nullptr, buffer, id, FALSE) == FALSE)
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continue;
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path = wstr_to_utf8(buffer);
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if(!is_slash(path.back()))
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path += '\\';
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path += subdir;
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std::replace(path.begin(), path.end(), '/', '\\');
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DirectorySearch(path.c_str(), ext, &results);
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}
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return results;
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}
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void SetRTPriority(void)
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{
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if(RTPrioLevel > 0)
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{
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if(!SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL))
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ERR("Failed to set priority level for thread\n");
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}
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}
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#else
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#include <sys/types.h>
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#include <unistd.h>
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#include <dirent.h>
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#ifdef __FreeBSD__
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#include <sys/sysctl.h>
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#endif
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#ifdef __HAIKU__
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#include <FindDirectory.h>
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#endif
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#ifdef HAVE_PROC_PIDPATH
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#include <libproc.h>
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#endif
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#if defined(HAVE_PTHREAD_SETSCHEDPARAM) && !defined(__OpenBSD__)
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#include <pthread.h>
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#include <sched.h>
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#endif
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#ifdef HAVE_RTKIT
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#include <sys/time.h>
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#include <sys/resource.h>
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#include "dbus_wrap.h"
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#include "rtkit.h"
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#ifndef RLIMIT_RTTIME
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#define RLIMIT_RTTIME 15
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#endif
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#endif
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const PathNamePair &GetProcBinary()
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{
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static al::optional<PathNamePair> procbin;
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if(procbin) return *procbin;
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al::vector<char> pathname;
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#ifdef __FreeBSD__
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size_t pathlen;
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int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
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if(sysctl(mib, 4, nullptr, &pathlen, nullptr, 0) == -1)
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WARN("Failed to sysctl kern.proc.pathname: %s\n", strerror(errno));
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else
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{
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pathname.resize(pathlen + 1);
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sysctl(mib, 4, pathname.data(), &pathlen, nullptr, 0);
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pathname.resize(pathlen);
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}
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#endif
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#ifdef HAVE_PROC_PIDPATH
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if(pathname.empty())
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{
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char procpath[PROC_PIDPATHINFO_MAXSIZE]{};
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const pid_t pid{getpid()};
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if(proc_pidpath(pid, procpath, sizeof(procpath)) < 1)
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ERR("proc_pidpath(%d, ...) failed: %s\n", pid, strerror(errno));
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else
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pathname.insert(pathname.end(), procpath, procpath+strlen(procpath));
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}
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#endif
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#ifdef __HAIKU__
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if(pathname.empty())
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{
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char procpath[PATH_MAX];
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if(find_path(B_APP_IMAGE_SYMBOL, B_FIND_PATH_IMAGE_PATH, NULL, procpath, sizeof(procpath)) == B_OK)
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pathname.insert(pathname.end(), procpath, procpath+strlen(procpath));
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}
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#endif
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#ifndef __SWITCH__
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if(pathname.empty())
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{
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static const char SelfLinkNames[][32]{
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"/proc/self/exe",
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"/proc/self/file",
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"/proc/curproc/exe",
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"/proc/curproc/file"
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};
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pathname.resize(256);
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const char *selfname{};
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ssize_t len{};
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for(const char *name : SelfLinkNames)
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{
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selfname = name;
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len = readlink(selfname, pathname.data(), pathname.size());
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if(len >= 0 || errno != ENOENT) break;
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}
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while(len > 0 && static_cast<size_t>(len) == pathname.size())
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{
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pathname.resize(pathname.size() << 1);
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len = readlink(selfname, pathname.data(), pathname.size());
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}
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if(len <= 0)
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{
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WARN("Failed to readlink %s: %s\n", selfname, strerror(errno));
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len = 0;
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}
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pathname.resize(static_cast<size_t>(len));
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}
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#endif
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while(!pathname.empty() && pathname.back() == 0)
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pathname.pop_back();
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auto sep = std::find(pathname.crbegin(), pathname.crend(), '/');
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if(sep != pathname.crend())
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procbin = al::make_optional<PathNamePair>(std::string(pathname.cbegin(), sep.base()-1),
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std::string(sep.base(), pathname.cend()));
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else
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procbin = al::make_optional<PathNamePair>(std::string{},
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std::string(pathname.cbegin(), pathname.cend()));
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TRACE("Got binary: \"%s\", \"%s\"\n", procbin->path.c_str(), procbin->fname.c_str());
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return *procbin;
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}
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namespace {
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void DirectorySearch(const char *path, const char *ext, al::vector<std::string> *const results)
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{
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TRACE("Searching %s for *%s\n", path, ext);
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DIR *dir{opendir(path)};
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if(!dir) return;
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const auto base = results->size();
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const size_t extlen{strlen(ext)};
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while(struct dirent *dirent{readdir(dir)})
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{
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if(strcmp(dirent->d_name, ".") == 0 || strcmp(dirent->d_name, "..") == 0)
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continue;
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const size_t len{strlen(dirent->d_name)};
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if(len <= extlen) continue;
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if(al::strcasecmp(dirent->d_name+len-extlen, ext) != 0)
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continue;
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results->emplace_back();
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std::string &str = results->back();
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str = path;
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if(str.back() != '/')
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str.push_back('/');
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str += dirent->d_name;
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}
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closedir(dir);
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const al::span<std::string> newlist{results->data()+base, results->size()-base};
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std::sort(newlist.begin(), newlist.end());
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for(const auto &name : newlist)
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TRACE(" got %s\n", name.c_str());
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}
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} // namespace
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al::vector<std::string> SearchDataFiles(const char *ext, const char *subdir)
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{
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static std::mutex search_lock;
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std::lock_guard<std::mutex> _{search_lock};
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al::vector<std::string> results;
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if(subdir[0] == '/')
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{
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DirectorySearch(subdir, ext, &results);
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return results;
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}
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/* Search the app-local directory. */
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if(auto localpath = al::getenv("ALSOFT_LOCAL_PATH"))
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DirectorySearch(localpath->c_str(), ext, &results);
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else
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{
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al::vector<char> cwdbuf(256);
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while(!getcwd(cwdbuf.data(), cwdbuf.size()))
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{
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if(errno != ERANGE)
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{
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cwdbuf.clear();
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break;
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}
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cwdbuf.resize(cwdbuf.size() << 1);
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}
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if(cwdbuf.empty())
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DirectorySearch(".", ext, &results);
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else
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{
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DirectorySearch(cwdbuf.data(), ext, &results);
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cwdbuf.clear();
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}
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}
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// Search local data dir
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if(auto datapath = al::getenv("XDG_DATA_HOME"))
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{
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std::string &path = *datapath;
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if(path.back() != '/')
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path += '/';
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path += subdir;
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DirectorySearch(path.c_str(), ext, &results);
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}
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else if(auto homepath = al::getenv("HOME"))
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{
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std::string &path = *homepath;
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if(path.back() == '/')
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path.pop_back();
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path += "/.local/share/";
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path += subdir;
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DirectorySearch(path.c_str(), ext, &results);
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}
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// Search global data dirs
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std::string datadirs{al::getenv("XDG_DATA_DIRS").value_or("/usr/local/share/:/usr/share/")};
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size_t curpos{0u};
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while(curpos < datadirs.size())
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{
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size_t nextpos{datadirs.find(':', curpos)};
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std::string path{(nextpos != std::string::npos) ?
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datadirs.substr(curpos, nextpos++ - curpos) : datadirs.substr(curpos)};
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curpos = nextpos;
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if(path.empty()) continue;
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if(path.back() != '/')
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path += '/';
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path += subdir;
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DirectorySearch(path.c_str(), ext, &results);
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}
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#ifdef ALSOFT_INSTALL_DATADIR
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// Search the installation data directory
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{
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std::string path{ALSOFT_INSTALL_DATADIR};
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if(!path.empty())
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{
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if(path.back() != '/')
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path += '/';
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path += subdir;
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DirectorySearch(path.c_str(), ext, &results);
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}
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}
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#endif
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return results;
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}
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namespace {
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bool SetRTPriorityPthread(int prio)
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{
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int err{ENOTSUP};
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#if defined(HAVE_PTHREAD_SETSCHEDPARAM) && !defined(__OpenBSD__)
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/* Get the min and max priority for SCHED_RR. Limit the max priority to
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* half, for now, to ensure the thread can't take the highest priority and
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* go rogue.
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*/
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int rtmin{sched_get_priority_min(SCHED_RR)};
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int rtmax{sched_get_priority_max(SCHED_RR)};
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rtmax = (rtmax-rtmin)/2 + rtmin;
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struct sched_param param{};
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param.sched_priority = clampi(prio, rtmin, rtmax);
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#ifdef SCHED_RESET_ON_FORK
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err = pthread_setschedparam(pthread_self(), SCHED_RR|SCHED_RESET_ON_FORK, ¶m);
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if(err == EINVAL)
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#endif
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err = pthread_setschedparam(pthread_self(), SCHED_RR, ¶m);
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if(err == 0) return true;
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#else
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std::ignore = prio;
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#endif
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WARN("pthread_setschedparam failed: %s (%d)\n", std::strerror(err), err);
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return false;
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}
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bool SetRTPriorityRTKit(int prio)
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{
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#ifdef HAVE_RTKIT
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if(!HasDBus())
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{
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WARN("D-Bus not available\n");
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return false;
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}
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dbus::Error error;
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dbus::ConnectionPtr conn{dbus_bus_get(DBUS_BUS_SYSTEM, &error.get())};
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if(!conn)
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{
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WARN("D-Bus connection failed with %s: %s\n", error->name, error->message);
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return false;
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}
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/* Don't stupidly exit if the connection dies while doing this. */
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dbus_connection_set_exit_on_disconnect(conn.get(), false);
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int nicemin{};
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int err{rtkit_get_min_nice_level(conn.get(), &nicemin)};
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if(err == -ENOENT)
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{
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err = std::abs(err);
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ERR("Could not query RTKit: %s (%d)\n", std::strerror(err), err);
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return false;
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}
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int rtmax{rtkit_get_max_realtime_priority(conn.get())};
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TRACE("Maximum real-time priority: %d, minimum niceness: %d\n", rtmax, nicemin);
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auto limit_rttime = [](DBusConnection *c) -> int
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{
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using ulonglong = unsigned long long;
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long long maxrttime{rtkit_get_rttime_usec_max(c)};
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if(maxrttime <= 0) return static_cast<int>(std::abs(maxrttime));
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const ulonglong umaxtime{static_cast<ulonglong>(maxrttime)};
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struct rlimit rlim{};
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if(getrlimit(RLIMIT_RTTIME, &rlim) != 0)
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return errno;
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TRACE("RTTime max: %llu (hard: %llu, soft: %llu)\n", umaxtime, ulonglong{rlim.rlim_max},
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ulonglong{rlim.rlim_cur});
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if(rlim.rlim_max > umaxtime)
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{
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rlim.rlim_max = static_cast<rlim_t>(umaxtime);
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rlim.rlim_cur = std::min(rlim.rlim_cur, rlim.rlim_max);
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if(setrlimit(RLIMIT_RTTIME, &rlim) != 0)
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return errno;
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}
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return 0;
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};
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if(rtmax > 0)
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{
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if(AllowRTTimeLimit)
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|
{
|
|
err = limit_rttime(conn.get());
|
|
if(err != 0)
|
|
WARN("Failed to set RLIMIT_RTTIME for RTKit: %s (%d)\n",
|
|
std::strerror(err), err);
|
|
}
|
|
|
|
/* Limit the maximum real-time priority to half. */
|
|
rtmax = (rtmax+1)/2;
|
|
prio = clampi(prio, 1, rtmax);
|
|
|
|
TRACE("Making real-time with priority %d (max: %d)\n", prio, rtmax);
|
|
err = rtkit_make_realtime(conn.get(), 0, prio);
|
|
if(err == 0) return true;
|
|
|
|
err = std::abs(err);
|
|
WARN("Failed to set real-time priority: %s (%d)\n", std::strerror(err), err);
|
|
}
|
|
/* Don't try to set the niceness for non-Linux systems. Standard POSIX has
|
|
* niceness as a per-process attribute, while the intent here is for the
|
|
* audio processing thread only to get a priority boost. Currently only
|
|
* Linux is known to have per-thread niceness.
|
|
*/
|
|
#ifdef __linux__
|
|
if(nicemin < 0)
|
|
{
|
|
TRACE("Making high priority with niceness %d\n", nicemin);
|
|
err = rtkit_make_high_priority(conn.get(), 0, nicemin);
|
|
if(err == 0) return true;
|
|
|
|
err = std::abs(err);
|
|
WARN("Failed to set high priority: %s (%d)\n", std::strerror(err), err);
|
|
}
|
|
#endif /* __linux__ */
|
|
|
|
#else
|
|
|
|
std::ignore = prio;
|
|
WARN("D-Bus not supported\n");
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
void SetRTPriority()
|
|
{
|
|
if(RTPrioLevel <= 0)
|
|
return;
|
|
|
|
if(SetRTPriorityPthread(RTPrioLevel))
|
|
return;
|
|
if(SetRTPriorityRTKit(RTPrioLevel))
|
|
return;
|
|
}
|
|
|
|
#endif
|