lidavidm commented on a change in pull request #12150:
URL: https://github.com/apache/arrow/pull/12150#discussion_r784838047
##########
File path: cpp/src/arrow/io/test_common.cc
##########
@@ -48,6 +52,28 @@ void AssertFileContents(const std::string& path, const
std::string& contents) {
bool FileExists(const std::string& path) { return
std::ifstream(path.c_str()).good(); }
+Status PurgeLocalFileFromOsCache(const std::string& path) {
+#ifdef _WIN32
+ return Status::NotImplemented("Cannot yet purge files from cache on
Windows");
+#else
+ int fd = open(path.c_str(), O_WRONLY);
+ if (fd < 0) {
+ return IOErrorFromErrno(errno, "open on ", path,
+ " to clear from cache did not succeed.");
+ }
+ int err = posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED);
Review comment:
Ah, it also seems this isn't supported on MacOS:
https://github.com/apache/arrow/runs/4811739968?check_suite_focus=true#step:7:779
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