Initial commit

1 files changed, 54 insertions, 0 deletions

diff --git a/src/libs6dns/s6dns_resolven_loop.c b/src/libs6dns/s6dns_resolven_loop.c
new file mode 100644
index 0000000..6e0c3b4
--- /dev/null
+++ b/src/libs6dns/s6dns_resolven_loop.c
@@ -0,0 +1,54 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/tai.h>
+#include <skalibs/iopause.h>
+#include <s6-dns/s6dns-engine.h>
+#include <s6-dns/s6dns-resolve.h>
+
+ /*
+    This is basically a synchronous interface to s6dns_engine.
+    It resolves n dts at the same time.
+ */
+
+int s6dns_resolven_loop (s6dns_engine_t *dt, unsigned int n, unsigned int or, tain_t const *deadline, tain_t *stamp)
+{
+  iopause_fd x[n] ;
+  unsigned int count = 0 ;
+  for (;;)
+  {
+    tain_t localdeadline = *deadline ; 
+    register int r ;
+    register unsigned int i = 0 ;
+    register unsigned int j = 0 ;
+    for (; i < n ; i++) if (dt[i].status == EAGAIN)
+    {
+      s6dns_engine_nextdeadline(dt + i, &localdeadline) ;
+      x[j].fd = dt[i].fd ;
+      x[j].events = (s6dns_engine_isreadable(dt + i) ? IOPAUSE_READ : 0) | (s6dns_engine_iswritable(dt + i) ? IOPAUSE_WRITE : 0) ;
+      j++ ;
+    }
+    if (!j) break ;
+    r = iopause_stamp(x, j, &localdeadline, stamp) ;
+    if (r < 0) return -1 ;
+    else if (!r)
+    {
+      if (tain_less(deadline, stamp)) return (errno = ETIMEDOUT, -1) ;
+      for (i = 0 ; i < n ; i++) if (dt[i].status == EAGAIN)
+        if (s6dns_engine_timeout(dt + i, stamp) && (or >= 2)) return i ;
+    }
+    else
+    {
+      for (i = 0 ; i < n ; i++) if (dt[i].status == EAGAIN)
+      {
+        r = s6dns_engine_event(dt + i, stamp) ;
+        if (or)
+        {
+          if (r && ((r > 0) || (or >= 2))) return i ;
+        }
+        else if (r > 0) count++ ;
+      }
+    }
+  }
+  return or ? (errno = ENOENT, -1) : (int)count ;
+}