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createTempDir(): Use std::atomic

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This commit is contained in:
Eelco Dolstra 2022-11-18 09:37:11 +01:00
parent f423d4425f
commit f1ab082ac4
1 changed files with 5 additions and 4 deletions
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9
src/libutil/filesystem.cc
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@ -1,5 +1,6 @@
#include <sys/time.h> #include <sys/time.h>
#include <filesystem> #include <filesystem>
#include <atomic>
#include "finally.hh" #include "finally.hh"
#include "util.hh" #include "util.hh"
@ -10,7 +11,7 @@ namespace fs = std::filesystem;
namespace nix { namespace nix {
static Path tempName(Path tmpRoot, const Path & prefix, bool includePid, static Path tempName(Path tmpRoot, const Path & prefix, bool includePid,
int & counter) std::atomic<unsigned int> & counter)
{ {
tmpRoot = canonPath(tmpRoot.empty() ? getEnv("TMPDIR").value_or("/tmp") : tmpRoot, true); tmpRoot = canonPath(tmpRoot.empty() ? getEnv("TMPDIR").value_or("/tmp") : tmpRoot, true);
if (includePid) if (includePid)
@ -22,9 +23,9 @@ static Path tempName(Path tmpRoot, const Path & prefix, bool includePid,
Path createTempDir(const Path & tmpRoot, const Path & prefix, Path createTempDir(const Path & tmpRoot, const Path & prefix,
bool includePid, bool useGlobalCounter, mode_t mode) bool includePid, bool useGlobalCounter, mode_t mode)
{ {
static int globalCounter = 0; static std::atomic<unsigned int> globalCounter = 0;
int localCounter = 0; std::atomic<unsigned int> localCounter = 0;
int & counter(useGlobalCounter ? globalCounter : localCounter); auto & counter(useGlobalCounter ? globalCounter : localCounter);
while (1) { while (1) {
checkInterrupt(); checkInterrupt();