1 files changed, 26 insertions, 0 deletions
diff --git a/src/libunixonacid/timed_flush.c b/src/libunixonacid/timed_flush.c
new file mode 100644
index 0000000..2d60256
--- /dev/null
+++ b/src/libunixonacid/timed_flush.c
@@ -0,0 +1,26 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/error.h>
+#include <skalibs/bufalloc.h>
+#include <skalibs/functypes.h>
+#include <skalibs/iopause.h>
+#include <skalibs/tai.h>
+#include <skalibs/unix-timed.h>
+
+int timed_flush (void *b, initfunc_t_ref getfd, initfunc_t_ref isnonempty, initfunc_t_ref flush, tain_t const *deadline, tain_t *stamp)
+{
+  iopause_fd x = { .fd = (*getfd)(b), .events = IOPAUSE_WRITE, .revents = 0 } ;
+  while ((*isnonempty)(b))
+  {
+    register int r = iopause_stamp(&x, 1, deadline, stamp) ;
+    if (r < 0) return 0 ;
+    else if (!r) return (errno = ETIMEDOUT, 0) ;
+    else if (x.revents & IOPAUSE_WRITE)
+    {
+      if (!((*flush)(b)) && !error_isagain(errno)) return 0 ;
+    }
+    else if (x.revents & IOPAUSE_EXCEPT) return (*flush)(b) ;
+  }
+  return 1 ;
+}