add hg and python

1 files changed, 105 insertions, 0 deletions

diff --git a/sys/src/cmd/python/Include/pymem.h b/sys/src/cmd/python/Include/pymem.h
new file mode 100644
index 000000000..671f967c8
--- /dev/null
+++ b/sys/src/cmd/python/Include/pymem.h
@@ -0,0 +1,105 @@
+/* The PyMem_ family:  low-level memory allocation interfaces.
+   See objimpl.h for the PyObject_ memory family.
+*/
+
+#ifndef Py_PYMEM_H
+#define Py_PYMEM_H
+
+#include "pyport.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* BEWARE:
+
+   Each interface exports both functions and macros.  Extension modules should
+   use the functions, to ensure binary compatibility across Python versions.
+   Because the Python implementation is free to change internal details, and
+   the macros may (or may not) expose details for speed, if you do use the
+   macros you must recompile your extensions with each Python release.
+
+   Never mix calls to PyMem_ with calls to the platform malloc/realloc/
+   calloc/free.  For example, on Windows different DLLs may end up using
+   different heaps, and if you use PyMem_Malloc you'll get the memory from the
+   heap used by the Python DLL; it could be a disaster if you free()'ed that
+   directly in your own extension.  Using PyMem_Free instead ensures Python
+   can return the memory to the proper heap.  As another example, in
+   PYMALLOC_DEBUG mode, Python wraps all calls to all PyMem_ and PyObject_
+   memory functions in special debugging wrappers that add additional
+   debugging info to dynamic memory blocks.  The system routines have no idea
+   what to do with that stuff, and the Python wrappers have no idea what to do
+   with raw blocks obtained directly by the system routines then.
+*/
+
+/*
+ * Raw memory interface
+ * ====================
+ */
+
+/* Functions
+
+   Functions supplying platform-independent semantics for malloc/realloc/
+   free.  These functions make sure that allocating 0 bytes returns a distinct
+   non-NULL pointer (whenever possible -- if we're flat out of memory, NULL
+   may be returned), even if the platform malloc and realloc don't.
+   Returned pointers must be checked for NULL explicitly.  No action is
+   performed on failure (no exception is set, no warning is printed, etc).
+*/
+
+PyAPI_FUNC(void *) PyMem_Malloc(size_t);
+PyAPI_FUNC(void *) PyMem_Realloc(void *, size_t);
+PyAPI_FUNC(void) PyMem_Free(void *);
+
+/* Starting from Python 1.6, the wrappers Py_{Malloc,Realloc,Free} are
+   no longer supported. They used to call PyErr_NoMemory() on failure. */
+
+/* Macros. */
+#ifdef PYMALLOC_DEBUG
+/* Redirect all memory operations to Python's debugging allocator. */
+#define PyMem_MALLOC		PyObject_MALLOC
+#define PyMem_REALLOC		PyObject_REALLOC
+#define PyMem_FREE		PyObject_FREE
+
+#else	/* ! PYMALLOC_DEBUG */
+
+/* PyMem_MALLOC(0) means malloc(1). Some systems would return NULL
+   for malloc(0), which would be treated as an error. Some platforms
+   would return a pointer with no memory behind it, which would break
+   pymalloc. To solve these problems, allocate an extra byte. */
+#define PyMem_MALLOC(n)         malloc((n) ? (n) : 1)
+#define PyMem_REALLOC(p, n)     realloc((p), (n) ? (n) : 1)
+#define PyMem_FREE		free
+
+#endif	/* PYMALLOC_DEBUG */
+
+/*
+ * Type-oriented memory interface
+ * ==============================
+ *
+ * These are carried along for historical reasons.  There's rarely a good
+ * reason to use them anymore (you can just as easily do the multiply and
+ * cast yourself).
+ */
+
+#define PyMem_New(type, n) \
+	( (type *) PyMem_Malloc((n) * sizeof(type)) )
+#define PyMem_NEW(type, n) \
+	( (type *) PyMem_MALLOC((n) * sizeof(type)) )
+
+#define PyMem_Resize(p, type, n) \
+	( (p) = (type *) PyMem_Realloc((p), (n) * sizeof(type)) )
+#define PyMem_RESIZE(p, type, n) \
+	( (p) = (type *) PyMem_REALLOC((p), (n) * sizeof(type)) )
+
+/* PyMem{Del,DEL} are left over from ancient days, and shouldn't be used
+ * anymore.  They're just confusing aliases for PyMem_{Free,FREE} now.
+ */
+#define PyMem_Del		PyMem_Free
+#define PyMem_DEL		PyMem_FREE
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !Py_PYMEM_H */