70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
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#ifndef MYPYC_UTIL_H
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#define MYPYC_UTIL_H
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#include <Python.h>
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#include <frameobject.h>
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#include <assert.h>
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#if defined(__clang__) || defined(__GNUC__)
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#define likely(x) __builtin_expect((x),1)
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#define unlikely(x) __builtin_expect((x),0)
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#define CPy_Unreachable() __builtin_unreachable()
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#else
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#define likely(x) (x)
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#define unlikely(x) (x)
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#define CPy_Unreachable() abort()
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#endif
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#if defined(__clang__) || defined(__GNUC__)
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#define CPy_NOINLINE __attribute__((noinline))
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#elif defined(_MSC_VER)
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#define CPy_NOINLINE __declspec(noinline)
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#else
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#define CPy_NOINLINE
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#endif
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// INCREF and DECREF that assert the pointer is not NULL.
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// asserts are disabled in release builds so there shouldn't be a perf hit.
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// I'm honestly kind of surprised that this isn't done by default.
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#define CPy_INCREF(p) do { assert(p); Py_INCREF(p); } while (0)
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#define CPy_DECREF(p) do { assert(p); Py_DECREF(p); } while (0)
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// Here just for consistency
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#define CPy_XDECREF(p) Py_XDECREF(p)
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// Tagged integer -- our representation of Python 'int' objects.
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// Small enough integers are represented as unboxed integers (shifted
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// left by 1); larger integers (larger than 63 bits on a 64-bit
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// platform) are stored as a tagged pointer (PyObject *)
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// representing a Python int object, with the lowest bit set.
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// Tagged integers are always normalized. A small integer *must not*
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// have the tag bit set.
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typedef size_t CPyTagged;
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typedef size_t CPyPtr;
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#define CPY_INT_BITS (CHAR_BIT * sizeof(CPyTagged))
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#define CPY_TAGGED_MAX (((Py_ssize_t)1 << (CPY_INT_BITS - 2)) - 1)
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#define CPY_TAGGED_MIN (-((Py_ssize_t)1 << (CPY_INT_BITS - 2)))
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#define CPY_TAGGED_ABS_MIN (0-(size_t)CPY_TAGGED_MIN)
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typedef PyObject CPyModule;
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// Tag bit used for long integers
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#define CPY_INT_TAG 1
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// Error value for fixed-width (low-level) integers
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#define CPY_LL_INT_ERROR -113
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typedef void (*CPyVTableItem)(void);
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static inline CPyTagged CPyTagged_ShortFromInt(int x) {
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return x << 1;
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}
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static inline CPyTagged CPyTagged_ShortFromSsize_t(Py_ssize_t x) {
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return x << 1;
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}
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#endif
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