add ZAPI_GV macro

include/zapi/Global.h

@@ -18,6 +18,7 @@
 #define ZAPI_GLOBAL_H
 
 #include "php/main/php.h"
+#include "php/Zend/zend_API.h"
 
 #include "zapi/Version.h"
 #include "zapi/Config.h"
@@ -198,4 +199,34 @@ using Callback = std::function<void()>();
 
 #define ZAPI_ASSERT(x) (x);
 
+
+// The way how PHP C API deals with "global" variables is peculiar.
+//
+// The following macros are supposed to turn into a structure that is going
+// to be instantiated for each parallel running request, and for which the
+// PHP engine allocates a certain amount of memory, and a magic pointer that
+// is passed and should be forwarded to every thinkable PHP function.
+//
+// We don't use this architecture. We have our own environment object
+// that makes much more sense, and that we use. However, the Zend engine
+// expects this structure and this structure to exist.
+ZEND_BEGIN_MODULE_GLOBALS(zapi)
+ZEND_END_MODULE_GLOBALS(zapi)
+
+// And now we're going to define a macro. This also is a uncommon architecture
+// from PHP to get access to a variable from the structure above.
+#ifdef ZTS
+#  define ZAPI_G(v) TSRM(zapi_globals_id, zapi_globals *, v)
+#else
+#  define ZAPI_G(v) (zapi_globals.v)
+#endif
+
+
+// We're almost there, we now need to declare an instance of the
+// structure defined above (if building for a single thread) or some
+// sort of impossible to understand magic pointer-to-a-pointer (for
+// multi-threading builds). We make this a static variable because
+// this already is bad enough.
+ZEND_EXTERN_MODULE_GLOBALS(zapi)
+
 #endif //ZAPI_GLOBAL_H

src/CMakeLists.txt

@@ -1,5 +1,6 @@
 set(ZAPI_SRC
-    kernel/Global.cpp)
+    kernel/Global.cpp
+    vm/Extension.cpp)
 
 zapi_add_library(${ZAPI_PROJECT_NAME} SHARED ${ZAPI_SRC}
                  ${ZAPI_PUBLIC_HEADERS}

src/vm/Extension.cpp

@@ -0,0 +1,40 @@
+// Copyright 2017-2018 zzu_softboy <zzu_softboy@163.com>
+//
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Created by zzu_softboy on 06/06/2017.
+
+#include "zapi/vm/Extension.h"
+#include "php/Zend/zend_API.h"
+
+#ifdef ZTS
+#  include "TSRM.h"
+#endif
+
+namespace zapi
+{
+namespace vm
+{
+
+/**
+ * We're almost there, we now need to declare an instance of the
+ * structure defined above (if building for a single thread) or some
+ * sort of impossible to understand magic pointer-to-a-pointer (for
+ * multi-threading builds). We make this a static variable because
+ * this already is bad enough.
+ */
+ZEND_DECLARE_MODULE_GLOBALS(zapi)
+
+static void init_globals(zend_zapi_globals *globals);
+
+} // vm
+} // zapi