Switch to CPython's pthread library

from_cpython/Include/pyconfig.h

@@ -27,6 +27,7 @@
 #define SIZEOF_INT 4
 #define SIZEOF_LONG 8
 #define SIZEOF_LONG_LONG 8
+#define SIZEOF_PTHREAD_T 8
 #define HAVE_COPYSIGN 1
 #define HAVE_ROUND 1
 #define HAVE_HYPOT 1

src/core/threading.cpp

@@ -613,10 +613,6 @@ void allowGLReadPreemption() {
 }
 #endif
 
-extern "C" long PyThread_get_thread_ident(void) noexcept {
-    return pthread_self();
-}
-
 // We don't support CPython's TLS (yet?)
 extern "C" void PyThread_ReInitTLS(void) noexcept {
     // don't have to do anything since we don't support TLS

src/runtime/builtin_modules/thread.cpp

@@ -12,8 +12,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#include <pthread.h>
 #include <stddef.h>
 
+#include "Python.h"
+#include "pythread.h"
+
 #include "core/threading.h"
 #include "core/types.h"
 #include "runtime/objmodel.h"
@@ -21,6 +25,34 @@
 
 using namespace pyston::threading;
 
+
+static int initialized;
+static void PyThread__init_thread(void); /* Forward */
+
+extern "C" void PyThread_init_thread(void) noexcept {
+#ifdef Py_DEBUG
+    char* p = Py_GETENV("PYTHONTHREADDEBUG");
+
+    if (p) {
+        if (*p)
+            thread_debug = atoi(p);
+        else
+            thread_debug = 1;
+    }
+#endif /* Py_DEBUG */
+    if (initialized)
+        return;
+    initialized = 1;
+    PyThread__init_thread();
+}
+
+/* Support for runtime thread stack size tuning.
+   A value of 0 means using the platform's default stack size
+   or the size specified by the THREAD_STACK_SIZE macro. */
+static size_t _pythread_stacksize = 0;
+
+#include "thread_pthread.h"
+
 namespace pyston {
 
 BoxedModule* thread_module;

tools/lint.py

@@ -2,7 +2,13 @@ import os
 import sys
 
 def file_is_from_cpython(fn):
-    return 'from_cpython' in fn
+    if 'from_cpython' in fn:
+        return True
+
+    if fn.endswith("/thread_pthread.h"):
+        return True
+
+    return False
 
 def verify_include_guard(_, dir, files):
     for bn in files: