benchmark silo added

[c11concurrency-benchmarks.git] / silo / fileutils.h

diff --git a/silo/fileutils.h b/silo/fileutils.h
new file mode 100644 (file)
index 0000000..af0cbad
--- /dev/null
+++ b/silo/fileutils.h
@@ -0,0 +1,40 @@
+#pragma once
+
+#include <unistd.h>
+#include <errno.h>
+
+class fileutils {
+public:
+
+  static int
+  writeall(int fd, const char *buf, int n)
+  {
+    while (n) {
+      int r = write(fd, buf, n);
+      if (unlikely(r < 0))
+        return r;
+      buf += r;
+      n -= r;
+    }
+    return 0;
+  }
+
+  static int
+  readall(int fd, char *buf, int n)
+  {
+    while (n) {
+      int r = read(fd, buf, n);
+      if (r == 0)
+        return EOF;
+      if (r < 0) {
+        if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
+          continue;
+        return r;
+      }
+      buf += r;
+      n -= r;
+    }
+    return 0;
+  }
+
+};