From 977d07a3ae47ef204665d1eda2d642e5064724f3 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 24 Jun 2019 12:01:19 +0200
Subject: Split build system into library and driver

---
 libbuild2/context.ixx | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 libbuild2/context.ixx

(limited to 'libbuild2/context.ixx')

diff --git a/libbuild2/context.ixx b/libbuild2/context.ixx
new file mode 100644
index 0000000..f947bd7
--- /dev/null
+++ b/libbuild2/context.ixx
@@ -0,0 +1,60 @@
+// file      : libbuild2/context.ixx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+namespace build2
+{
+  // wait_guard
+  //
+  inline wait_guard::
+  wait_guard ()
+      : start_count (0), task_count (nullptr), phase (false)
+  {
+  }
+
+  inline wait_guard::
+  wait_guard (atomic_count& tc, bool p)
+      : wait_guard (0, tc, p)
+  {
+  }
+
+  inline wait_guard::
+  wait_guard (size_t sc, atomic_count& tc, bool p)
+      : start_count (sc), task_count (&tc), phase (p)
+  {
+  }
+
+  inline wait_guard::
+  ~wait_guard () noexcept (false)
+  {
+    if (task_count != nullptr)
+      wait ();
+  }
+
+  inline wait_guard::
+  wait_guard (wait_guard&& x)
+      : start_count (x.start_count), task_count (x.task_count), phase (x.phase)
+  {
+    x.task_count = nullptr;
+  }
+
+  inline wait_guard& wait_guard::
+  operator= (wait_guard&& x)
+  {
+    if (&x != this)
+    {
+      assert (task_count == nullptr);
+      start_count = x.start_count; task_count = x.task_count; phase = x.phase;
+      x.task_count = nullptr;
+    }
+    return *this;
+  }
+
+  inline void wait_guard::
+  wait ()
+  {
+    phase_unlock u (phase);
+    sched.wait (start_count, *task_count);
+    task_count = nullptr;
+  }
+}
-- 
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