1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/builtin/TypedObjectConstants.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,112 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +// Specialized .h file to be used by both JS and C++ code.
1.11 +
1.12 +#ifndef builtin_TypedObjectConstants_h
1.13 +#define builtin_TypedObjectConstants_h
1.14 +
1.15 +///////////////////////////////////////////////////////////////////////////
1.16 +// Slots for typed prototypes
1.17 +
1.18 +#define JS_TYPROTO_SLOT_DESCR 0
1.19 +#define JS_TYPROTO_SLOTS 1
1.20 +
1.21 +///////////////////////////////////////////////////////////////////////////
1.22 +// Slots for type objects
1.23 +//
1.24 +// Some slots apply to all type objects and some are specific to
1.25 +// particular kinds of type objects. For simplicity we use the same
1.26 +// number of slots no matter what kind of type descriptor we are
1.27 +// working with, even though this is mildly wasteful.
1.28 +
1.29 +// Slots on all type objects
1.30 +#define JS_DESCR_SLOT_KIND 0 // Atomized string representation
1.31 +#define JS_DESCR_SLOT_STRING_REPR 1 // Atomized string representation
1.32 +#define JS_DESCR_SLOT_ALIGNMENT 2 // Alignment in bytes
1.33 +#define JS_DESCR_SLOT_SIZE 3 // Size in bytes, if sized, else 0
1.34 +#define JS_DESCR_SLOT_OPAQUE 4 // Atomized string representation
1.35 +#define JS_DESCR_SLOT_TYPROTO 5 // Prototype for instances, if any
1.36 +
1.37 +// Slots on scalars, references, and x4s
1.38 +#define JS_DESCR_SLOT_TYPE 6 // Type code
1.39 +
1.40 +// Slots on all array descriptors
1.41 +#define JS_DESCR_SLOT_ARRAY_ELEM_TYPE 6
1.42 +
1.43 +// Slots on sized array descriptors
1.44 +#define JS_DESCR_SLOT_SIZED_ARRAY_LENGTH 7
1.45 +
1.46 +// Slots on struct type objects
1.47 +#define JS_DESCR_SLOT_STRUCT_FIELD_NAMES 6
1.48 +#define JS_DESCR_SLOT_STRUCT_FIELD_TYPES 7
1.49 +#define JS_DESCR_SLOT_STRUCT_FIELD_OFFSETS 8
1.50 +
1.51 +// Maximum number of slots for any descriptor
1.52 +#define JS_DESCR_SLOTS 9
1.53 +
1.54 +// These constants are for use exclusively in JS code. In C++ code,
1.55 +// prefer TypeRepresentation::Scalar etc, which allows you to
1.56 +// write a switch which will receive a warning if you omit a case.
1.57 +#define JS_TYPEREPR_UNSIZED_ARRAY_KIND 0
1.58 +#define JS_TYPEREPR_MAX_UNSIZED_KIND 0 // Unsized kinds go above here
1.59 +#define JS_TYPEREPR_SCALAR_KIND 1
1.60 +#define JS_TYPEREPR_REFERENCE_KIND 2
1.61 +#define JS_TYPEREPR_STRUCT_KIND 3
1.62 +#define JS_TYPEREPR_SIZED_ARRAY_KIND 4
1.63 +#define JS_TYPEREPR_X4_KIND 5
1.64 +
1.65 +// These constants are for use exclusively in JS code. In C++ code,
1.66 +// prefer ScalarTypeRepresentation::TYPE_INT8 etc, which allows
1.67 +// you to write a switch which will receive a warning if you omit a
1.68 +// case.
1.69 +#define JS_SCALARTYPEREPR_INT8 0
1.70 +#define JS_SCALARTYPEREPR_UINT8 1
1.71 +#define JS_SCALARTYPEREPR_INT16 2
1.72 +#define JS_SCALARTYPEREPR_UINT16 3
1.73 +#define JS_SCALARTYPEREPR_INT32 4
1.74 +#define JS_SCALARTYPEREPR_UINT32 5
1.75 +#define JS_SCALARTYPEREPR_FLOAT32 6
1.76 +#define JS_SCALARTYPEREPR_FLOAT64 7
1.77 +#define JS_SCALARTYPEREPR_UINT8_CLAMPED 8
1.78 +
1.79 +// These constants are for use exclusively in JS code. In C++ code,
1.80 +// prefer ReferenceTypeRepresentation::TYPE_ANY etc, which allows
1.81 +// you to write a switch which will receive a warning if you omit a
1.82 +// case.
1.83 +#define JS_REFERENCETYPEREPR_ANY 0
1.84 +#define JS_REFERENCETYPEREPR_OBJECT 1
1.85 +#define JS_REFERENCETYPEREPR_STRING 2
1.86 +
1.87 +// These constants are for use exclusively in JS code. In C++ code,
1.88 +// prefer X4TypeRepresentation::TYPE_INT32 etc, since that allows
1.89 +// you to write a switch which will receive a warning if you omit a
1.90 +// case.
1.91 +#define JS_X4TYPEREPR_INT32 0
1.92 +#define JS_X4TYPEREPR_FLOAT32 1
1.93 +
1.94 +///////////////////////////////////////////////////////////////////////////
1.95 +// Slots for typed objects
1.96 +
1.97 +#define JS_TYPEDOBJ_SLOT_BYTEOFFSET 0
1.98 +#define JS_TYPEDOBJ_SLOT_BYTELENGTH 1
1.99 +#define JS_TYPEDOBJ_SLOT_OWNER 2
1.100 +#define JS_TYPEDOBJ_SLOT_NEXT_VIEW 3
1.101 +
1.102 +#define JS_DATAVIEW_SLOTS 4 // Number of slots for data views
1.103 +
1.104 +#define JS_TYPEDOBJ_SLOT_LENGTH 4 // Length of array (see (*) below)
1.105 +#define JS_TYPEDOBJ_SLOT_TYPE_DESCR 5 // For typed objects, type descr
1.106 +
1.107 +#define JS_TYPEDOBJ_SLOT_DATA 7 // private slot, based on alloc kind
1.108 +#define JS_TYPEDOBJ_SLOTS 6 // Number of slots for typed objs
1.109 +
1.110 +// (*) The JS_TYPEDOBJ_SLOT_LENGTH slot stores the length for typed objects of
1.111 +// sized and unsized array type. The slot contains 0 for non-arrays.
1.112 +// The slot also contains 0 for *unattached* typed objects, no matter what
1.113 +// type they have.
1.114 +
1.115 +#endif
