reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1 | /* |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 2 | * Copyright 2006 The Android Open Source Project |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 3 | * |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #ifndef SkTypes_DEFINED |
| 9 | #define SkTypes_DEFINED |
| 10 | |
bungeman | f20488b | 2015-07-29 11:49:40 -0700 | [diff] [blame] | 11 | // IWYU pragma: begin_exports |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 12 | #include "SkPreConfig.h" |
| 13 | #include "SkUserConfig.h" |
| 14 | #include "SkPostConfig.h" |
bungeman | f20488b | 2015-07-29 11:49:40 -0700 | [diff] [blame] | 15 | #include <stddef.h> |
bungeman@google.com | fab44db | 2013-10-11 18:50:45 +0000 | [diff] [blame] | 16 | #include <stdint.h> |
bsalomon | ef3fcd8 | 2014-12-12 08:51:38 -0800 | [diff] [blame] | 17 | #include <sys/types.h> |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 18 | |
mtklein | 95cc012 | 2015-04-27 15:11:01 -0700 | [diff] [blame] | 19 | #if defined(SK_ARM_HAS_NEON) |
| 20 | #include <arm_neon.h> |
| 21 | #elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 |
| 22 | #include <immintrin.h> |
| 23 | #endif |
bungeman | f20488b | 2015-07-29 11:49:40 -0700 | [diff] [blame] | 24 | // IWYU pragma: end_exports |
| 25 | |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
mtklein | 95cc012 | 2015-04-27 15:11:01 -0700 | [diff] [blame] | 28 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 29 | /** \file SkTypes.h |
| 30 | */ |
| 31 | |
reed@android.com | 9aa8b32 | 2010-04-13 13:22:54 +0000 | [diff] [blame] | 32 | /** See SkGraphics::GetVersion() to retrieve these at runtime |
| 33 | */ |
| 34 | #define SKIA_VERSION_MAJOR 1 |
| 35 | #define SKIA_VERSION_MINOR 0 |
| 36 | #define SKIA_VERSION_PATCH 0 |
| 37 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 38 | /* |
| 39 | memory wrappers to be implemented by the porting layer (platform) |
| 40 | */ |
| 41 | |
| 42 | /** Called internally if we run out of memory. The platform implementation must |
| 43 | not return, but should either throw an exception or otherwise exit. |
| 44 | */ |
reed@google.com | de916c8 | 2011-10-19 19:50:48 +0000 | [diff] [blame] | 45 | SK_API extern void sk_out_of_memory(void); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 46 | /** Called internally if we hit an unrecoverable error. |
| 47 | The platform implementation must not return, but should either throw |
| 48 | an exception or otherwise exit. |
| 49 | */ |
reed@google.com | de916c8 | 2011-10-19 19:50:48 +0000 | [diff] [blame] | 50 | SK_API extern void sk_throw(void); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 51 | |
| 52 | enum { |
| 53 | SK_MALLOC_TEMP = 0x01, //!< hint to sk_malloc that the requested memory will be freed in the scope of the stack frame |
| 54 | SK_MALLOC_THROW = 0x02 //!< instructs sk_malloc to call sk_throw if the memory cannot be allocated. |
| 55 | }; |
| 56 | /** Return a block of memory (at least 4-byte aligned) of at least the |
| 57 | specified size. If the requested memory cannot be returned, either |
mtklein@google.com | 519f967 | 2013-09-20 14:31:45 +0000 | [diff] [blame] | 58 | return null (if SK_MALLOC_TEMP bit is clear) or throw an exception |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 59 | (if SK_MALLOC_TEMP bit is set). To free the memory, call sk_free(). |
| 60 | */ |
ctguil@chromium.org | 7ffb1b2 | 2011-03-15 21:27:08 +0000 | [diff] [blame] | 61 | SK_API extern void* sk_malloc_flags(size_t size, unsigned flags); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 62 | /** Same as sk_malloc(), but hard coded to pass SK_MALLOC_THROW as the flag |
| 63 | */ |
reed@google.com | de916c8 | 2011-10-19 19:50:48 +0000 | [diff] [blame] | 64 | SK_API extern void* sk_malloc_throw(size_t size); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 65 | /** Same as standard realloc(), but this one never returns null on failure. It will throw |
| 66 | an exception if it fails. |
| 67 | */ |
reed@google.com | de916c8 | 2011-10-19 19:50:48 +0000 | [diff] [blame] | 68 | SK_API extern void* sk_realloc_throw(void* buffer, size_t size); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 69 | /** Free memory returned by sk_malloc(). It is safe to pass null. |
| 70 | */ |
reed@google.com | de916c8 | 2011-10-19 19:50:48 +0000 | [diff] [blame] | 71 | SK_API extern void sk_free(void*); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 72 | |
mtklein@google.com | 519f967 | 2013-09-20 14:31:45 +0000 | [diff] [blame] | 73 | /** Much like calloc: returns a pointer to at least size zero bytes, or NULL on failure. |
| 74 | */ |
| 75 | SK_API extern void* sk_calloc(size_t size); |
| 76 | |
| 77 | /** Same as sk_calloc, but throws an exception instead of returning NULL on failure. |
| 78 | */ |
| 79 | SK_API extern void* sk_calloc_throw(size_t size); |
| 80 | |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 81 | // bzero is safer than memset, but we can't rely on it, so... sk_bzero() |
| 82 | static inline void sk_bzero(void* buffer, size_t size) { |
| 83 | memset(buffer, 0, size); |
| 84 | } |
| 85 | |
reed@google.com | bdf7361 | 2011-09-06 14:56:20 +0000 | [diff] [blame] | 86 | /////////////////////////////////////////////////////////////////////////////// |
| 87 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 88 | #ifdef override_GLOBAL_NEW |
reed@google.com | bdf7361 | 2011-09-06 14:56:20 +0000 | [diff] [blame] | 89 | #include <new> |
| 90 | |
| 91 | inline void* operator new(size_t size) { |
| 92 | return sk_malloc_throw(size); |
| 93 | } |
| 94 | |
| 95 | inline void operator delete(void* p) { |
| 96 | sk_free(p); |
| 97 | } |
| 98 | #endif |
| 99 | |
| 100 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 101 | |
| 102 | #define SK_INIT_TO_AVOID_WARNING = 0 |
| 103 | |
| 104 | #ifndef SkDebugf |
george | c4ade57 | 2014-08-01 12:02:07 -0700 | [diff] [blame] | 105 | SK_API void SkDebugf(const char format[], ...); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 106 | #endif |
| 107 | |
| 108 | #ifdef SK_DEBUG |
commit-bot@chromium.org | 45d1d1d | 2014-04-30 18:24:16 +0000 | [diff] [blame] | 109 | #define SkASSERT(cond) SK_ALWAYSBREAK(cond) |
tomhudson@google.com | 0c00f21 | 2011-12-28 14:59:50 +0000 | [diff] [blame] | 110 | #define SkDEBUGFAIL(message) SkASSERT(false && message) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 111 | #define SkDEBUGCODE(code) code |
| 112 | #define SkDECLAREPARAM(type, var) , type var |
| 113 | #define SkPARAM(var) , var |
| 114 | // #define SkDEBUGF(args ) SkDebugf##args |
| 115 | #define SkDEBUGF(args ) SkDebugf args |
| 116 | #define SkAssertResult(cond) SkASSERT(cond) |
| 117 | #else |
| 118 | #define SkASSERT(cond) |
tomhudson@google.com | 0c00f21 | 2011-12-28 14:59:50 +0000 | [diff] [blame] | 119 | #define SkDEBUGFAIL(message) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 120 | #define SkDEBUGCODE(code) |
| 121 | #define SkDEBUGF(args) |
| 122 | #define SkDECLAREPARAM(type, var) |
| 123 | #define SkPARAM(var) |
| 124 | |
| 125 | // unlike SkASSERT, this guy executes its condition in the non-debug build |
| 126 | #define SkAssertResult(cond) cond |
| 127 | #endif |
| 128 | |
commit-bot@chromium.org | 45d1d1d | 2014-04-30 18:24:16 +0000 | [diff] [blame] | 129 | #define SkFAIL(message) SK_ALWAYSBREAK(false && message) |
commit-bot@chromium.org | 88cb22b | 2014-04-30 14:17:00 +0000 | [diff] [blame] | 130 | |
mtklein | b59161f | 2014-06-18 07:54:47 -0700 | [diff] [blame] | 131 | // We want to evaluate cond only once, and inside the SkASSERT somewhere so we see its string form. |
| 132 | // So we use the comma operator to make an SkDebugf that always returns false: we'll evaluate cond, |
| 133 | // and if it's true the assert passes; if it's false, we'll print the message and the assert fails. |
| 134 | #define SkASSERTF(cond, fmt, ...) SkASSERT((cond) || (SkDebugf(fmt"\n", __VA_ARGS__), false)) |
| 135 | |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 136 | #ifdef SK_DEVELOPER |
| 137 | #define SkDEVCODE(code) code |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 138 | #else |
| 139 | #define SkDEVCODE(code) |
commit-bot@chromium.org | 0f10f7b | 2014-03-13 18:02:17 +0000 | [diff] [blame] | 140 | #endif |
| 141 | |
| 142 | #ifdef SK_IGNORE_TO_STRING |
skia.committer@gmail.com | bc3d92a | 2014-03-14 03:02:26 +0000 | [diff] [blame] | 143 | #define SK_TO_STRING_NONVIRT() |
| 144 | #define SK_TO_STRING_VIRT() |
commit-bot@chromium.org | 0f10f7b | 2014-03-13 18:02:17 +0000 | [diff] [blame] | 145 | #define SK_TO_STRING_PUREVIRT() |
| 146 | #define SK_TO_STRING_OVERRIDE() |
| 147 | #else |
bungeman | 7403d87 | 2015-08-04 14:56:53 -0700 | [diff] [blame^] | 148 | class SkString; |
commit-bot@chromium.org | 0f10f7b | 2014-03-13 18:02:17 +0000 | [diff] [blame] | 149 | // the 'toString' helper functions convert Sk* objects to human-readable |
| 150 | // form in developer mode |
| 151 | #define SK_TO_STRING_NONVIRT() void toString(SkString* str) const; |
| 152 | #define SK_TO_STRING_VIRT() virtual void toString(SkString* str) const; |
| 153 | #define SK_TO_STRING_PUREVIRT() virtual void toString(SkString* str) const = 0; |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 154 | #define SK_TO_STRING_OVERRIDE() void toString(SkString* str) const override; |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 155 | #endif |
| 156 | |
vandebo@chromium.org | 28be72b | 2010-11-11 21:37:00 +0000 | [diff] [blame] | 157 | template <bool> |
| 158 | struct SkCompileAssert { |
| 159 | }; |
| 160 | |
bungeman@google.com | 562b2e6 | 2014-03-12 21:41:06 +0000 | [diff] [blame] | 161 | // Uses static_cast<bool>(expr) instead of bool(expr) due to |
| 162 | // https://connect.microsoft.com/VisualStudio/feedback/details/832915 |
bungeman@google.com | 9c28fa5 | 2014-03-13 17:51:05 +0000 | [diff] [blame] | 163 | |
| 164 | // The extra parentheses in SkCompileAssert<(...)> are a work around for |
| 165 | // http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57771 |
| 166 | // which was fixed in gcc 4.8.2. |
vandebo@chromium.org | 28be72b | 2010-11-11 21:37:00 +0000 | [diff] [blame] | 167 | #define SK_COMPILE_ASSERT(expr, msg) \ |
bungeman@google.com | 2f58209 | 2014-03-12 21:56:23 +0000 | [diff] [blame] | 168 | typedef SkCompileAssert<(static_cast<bool>(expr))> \ |
bungeman@google.com | 562b2e6 | 2014-03-12 21:41:06 +0000 | [diff] [blame] | 169 | msg[static_cast<bool>(expr) ? 1 : -1] SK_UNUSED |
vandebo@chromium.org | 28be72b | 2010-11-11 21:37:00 +0000 | [diff] [blame] | 170 | |
reed@google.com | 49a5b19 | 2012-10-25 17:31:39 +0000 | [diff] [blame] | 171 | /* |
| 172 | * Usage: SK_MACRO_CONCAT(a, b) to construct the symbol ab |
| 173 | * |
| 174 | * SK_MACRO_CONCAT_IMPL_PRIV just exists to make this work. Do not use directly |
| 175 | * |
| 176 | */ |
| 177 | #define SK_MACRO_CONCAT(X, Y) SK_MACRO_CONCAT_IMPL_PRIV(X, Y) |
| 178 | #define SK_MACRO_CONCAT_IMPL_PRIV(X, Y) X ## Y |
| 179 | |
| 180 | /* |
| 181 | * Usage: SK_MACRO_APPEND_LINE(foo) to make foo123, where 123 is the current |
| 182 | * line number. Easy way to construct |
| 183 | * unique names for local functions or |
| 184 | * variables. |
| 185 | */ |
| 186 | #define SK_MACRO_APPEND_LINE(name) SK_MACRO_CONCAT(name, __LINE__) |
| 187 | |
commit-bot@chromium.org | e61a86c | 2013-11-18 16:03:59 +0000 | [diff] [blame] | 188 | /** |
| 189 | * For some classes, it's almost always an error to instantiate one without a name, e.g. |
| 190 | * { |
| 191 | * SkAutoMutexAcquire(&mutex); |
| 192 | * <some code> |
| 193 | * } |
| 194 | * In this case, the writer meant to hold mutex while the rest of the code in the block runs, |
| 195 | * but instead the mutex is acquired and then immediately released. The correct usage is |
| 196 | * { |
| 197 | * SkAutoMutexAcquire lock(&mutex); |
| 198 | * <some code> |
| 199 | * } |
| 200 | * |
| 201 | * To prevent callers from instantiating your class without a name, use SK_REQUIRE_LOCAL_VAR |
| 202 | * like this: |
| 203 | * class classname { |
| 204 | * <your class> |
| 205 | * }; |
| 206 | * #define classname(...) SK_REQUIRE_LOCAL_VAR(classname) |
| 207 | * |
| 208 | * This won't work with templates, and you must inline the class' constructors and destructors. |
| 209 | * Take a look at SkAutoFree and SkAutoMalloc in this file for examples. |
| 210 | */ |
| 211 | #define SK_REQUIRE_LOCAL_VAR(classname) \ |
| 212 | SK_COMPILE_ASSERT(false, missing_name_for_##classname) |
| 213 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 214 | /////////////////////////////////////////////////////////////////////// |
| 215 | |
reed@google.com | 37a3133 | 2011-01-25 14:55:42 +0000 | [diff] [blame] | 216 | /** |
| 217 | * Fast type for signed 8 bits. Use for parameter passing and local variables, |
| 218 | * not for storage. |
| 219 | */ |
| 220 | typedef int S8CPU; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 221 | |
reed@google.com | 37a3133 | 2011-01-25 14:55:42 +0000 | [diff] [blame] | 222 | /** |
| 223 | * Fast type for unsigned 8 bits. Use for parameter passing and local |
| 224 | * variables, not for storage |
| 225 | */ |
| 226 | typedef unsigned U8CPU; |
| 227 | |
| 228 | /** |
| 229 | * Fast type for signed 16 bits. Use for parameter passing and local variables, |
| 230 | * not for storage |
| 231 | */ |
| 232 | typedef int S16CPU; |
| 233 | |
| 234 | /** |
| 235 | * Fast type for unsigned 16 bits. Use for parameter passing and local |
| 236 | * variables, not for storage |
| 237 | */ |
| 238 | typedef unsigned U16CPU; |
| 239 | |
| 240 | /** |
| 241 | * Meant to be faster than bool (doesn't promise to be 0 or 1, |
| 242 | * just 0 or non-zero |
| 243 | */ |
| 244 | typedef int SkBool; |
| 245 | |
| 246 | /** |
| 247 | * Meant to be a small version of bool, for storage purposes. Will be 0 or 1 |
| 248 | */ |
| 249 | typedef uint8_t SkBool8; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 250 | |
| 251 | #ifdef SK_DEBUG |
bungeman@google.com | 777ded0 | 2013-07-19 22:30:11 +0000 | [diff] [blame] | 252 | SK_API int8_t SkToS8(intmax_t); |
| 253 | SK_API uint8_t SkToU8(uintmax_t); |
| 254 | SK_API int16_t SkToS16(intmax_t); |
| 255 | SK_API uint16_t SkToU16(uintmax_t); |
| 256 | SK_API int32_t SkToS32(intmax_t); |
| 257 | SK_API uint32_t SkToU32(uintmax_t); |
commit-bot@chromium.org | a8c7f77 | 2014-01-24 21:46:29 +0000 | [diff] [blame] | 258 | SK_API int SkToInt(intmax_t); |
reed@google.com | 7fa2a65 | 2014-01-27 13:42:58 +0000 | [diff] [blame] | 259 | SK_API unsigned SkToUInt(uintmax_t); |
commit-bot@chromium.org | 490fb6b | 2014-03-06 17:16:26 +0000 | [diff] [blame] | 260 | SK_API size_t SkToSizeT(uintmax_t); |
bsalomon | ef3fcd8 | 2014-12-12 08:51:38 -0800 | [diff] [blame] | 261 | SK_API off_t SkToOffT(intmax_t x); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 262 | #else |
| 263 | #define SkToS8(x) ((int8_t)(x)) |
| 264 | #define SkToU8(x) ((uint8_t)(x)) |
| 265 | #define SkToS16(x) ((int16_t)(x)) |
| 266 | #define SkToU16(x) ((uint16_t)(x)) |
| 267 | #define SkToS32(x) ((int32_t)(x)) |
| 268 | #define SkToU32(x) ((uint32_t)(x)) |
commit-bot@chromium.org | a8c7f77 | 2014-01-24 21:46:29 +0000 | [diff] [blame] | 269 | #define SkToInt(x) ((int)(x)) |
reed@google.com | 7fa2a65 | 2014-01-27 13:42:58 +0000 | [diff] [blame] | 270 | #define SkToUInt(x) ((unsigned)(x)) |
commit-bot@chromium.org | 490fb6b | 2014-03-06 17:16:26 +0000 | [diff] [blame] | 271 | #define SkToSizeT(x) ((size_t)(x)) |
bsalomon | ef3fcd8 | 2014-12-12 08:51:38 -0800 | [diff] [blame] | 272 | #define SkToOffT(x) ((off_t)(x)) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 273 | #endif |
| 274 | |
| 275 | /** Returns 0 or 1 based on the condition |
| 276 | */ |
| 277 | #define SkToBool(cond) ((cond) != 0) |
| 278 | |
| 279 | #define SK_MaxS16 32767 |
| 280 | #define SK_MinS16 -32767 |
| 281 | #define SK_MaxU16 0xFFFF |
| 282 | #define SK_MinU16 0 |
| 283 | #define SK_MaxS32 0x7FFFFFFF |
caryclark@google.com | 594dd3c | 2012-09-24 19:33:57 +0000 | [diff] [blame] | 284 | #define SK_MinS32 -SK_MaxS32 |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 285 | #define SK_MaxU32 0xFFFFFFFF |
| 286 | #define SK_MinU32 0 |
humper@google.com | 0e51577 | 2013-01-07 19:54:40 +0000 | [diff] [blame] | 287 | #define SK_NaN32 (1 << 31) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 288 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 289 | /** Returns true if the value can be represented with signed 16bits |
| 290 | */ |
reed@android.com | 90209ca | 2009-11-21 19:58:04 +0000 | [diff] [blame] | 291 | static inline bool SkIsS16(long x) { |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 292 | return (int16_t)x == x; |
| 293 | } |
| 294 | |
| 295 | /** Returns true if the value can be represented with unsigned 16bits |
| 296 | */ |
reed@android.com | 90209ca | 2009-11-21 19:58:04 +0000 | [diff] [blame] | 297 | static inline bool SkIsU16(long x) { |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 298 | return (uint16_t)x == x; |
| 299 | } |
| 300 | |
| 301 | ////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 302 | #ifndef SK_OFFSETOF |
reed@google.com | 56d3a23 | 2012-03-21 12:25:48 +0000 | [diff] [blame] | 303 | #define SK_OFFSETOF(type, field) (size_t)((char*)&(((type*)1)->field) - (char*)1) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 304 | #endif |
| 305 | |
mtklein | fc00a7c | 2015-05-07 10:58:44 -0700 | [diff] [blame] | 306 | /** Returns the number of entries in an array (not a pointer) */ |
| 307 | template <typename T, size_t N> char (&SkArrayCountHelper(T (&array)[N]))[N]; |
| 308 | #define SK_ARRAY_COUNT(array) (sizeof(SkArrayCountHelper(array))) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 309 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 310 | #define SkAlign2(x) (((x) + 1) >> 1 << 1) |
reed@google.com | c6faa5a | 2012-06-27 15:07:11 +0000 | [diff] [blame] | 311 | #define SkIsAlign2(x) (0 == ((x) & 1)) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 312 | |
reed@google.com | c6faa5a | 2012-06-27 15:07:11 +0000 | [diff] [blame] | 313 | #define SkAlign4(x) (((x) + 3) >> 2 << 2) |
| 314 | #define SkIsAlign4(x) (0 == ((x) & 3)) |
| 315 | |
| 316 | #define SkAlign8(x) (((x) + 7) >> 3 << 3) |
| 317 | #define SkIsAlign8(x) (0 == ((x) & 7)) |
tomhudson@google.com | 01224d5 | 2011-11-28 18:22:01 +0000 | [diff] [blame] | 318 | |
mtklein | 0209e95 | 2014-08-28 14:10:05 -0700 | [diff] [blame] | 319 | #define SkAlignPtr(x) (sizeof(void*) == 8 ? SkAlign8(x) : SkAlign4(x)) |
| 320 | #define SkIsAlignPtr(x) (sizeof(void*) == 8 ? SkIsAlign8(x) : SkIsAlign4(x)) |
| 321 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 322 | typedef uint32_t SkFourByteTag; |
| 323 | #define SkSetFourByteTag(a, b, c, d) (((a) << 24) | ((b) << 16) | ((c) << 8) | (d)) |
| 324 | |
| 325 | /** 32 bit integer to hold a unicode value |
| 326 | */ |
| 327 | typedef int32_t SkUnichar; |
| 328 | /** 32 bit value to hold a millisecond count |
| 329 | */ |
| 330 | typedef uint32_t SkMSec; |
| 331 | /** 1 second measured in milliseconds |
| 332 | */ |
| 333 | #define SK_MSec1 1000 |
| 334 | /** maximum representable milliseconds |
| 335 | */ |
| 336 | #define SK_MSecMax 0x7FFFFFFF |
| 337 | /** Returns a < b for milliseconds, correctly handling wrap-around from 0xFFFFFFFF to 0 |
| 338 | */ |
| 339 | #define SkMSec_LT(a, b) ((int32_t)(a) - (int32_t)(b) < 0) |
| 340 | /** Returns a <= b for milliseconds, correctly handling wrap-around from 0xFFFFFFFF to 0 |
| 341 | */ |
| 342 | #define SkMSec_LE(a, b) ((int32_t)(a) - (int32_t)(b) <= 0) |
| 343 | |
commit-bot@chromium.org | 2b4e370 | 2014-04-07 18:26:22 +0000 | [diff] [blame] | 344 | /** The generation IDs in Skia reserve 0 has an invalid marker. |
| 345 | */ |
| 346 | #define SK_InvalidGenID 0 |
bsalomon | 1c63bf6 | 2014-07-22 13:09:46 -0700 | [diff] [blame] | 347 | /** The unique IDs in Skia reserve 0 has an invalid marker. |
| 348 | */ |
| 349 | #define SK_InvalidUniqueID 0 |
commit-bot@chromium.org | 2b4e370 | 2014-04-07 18:26:22 +0000 | [diff] [blame] | 350 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 351 | /**************************************************************************** |
| 352 | The rest of these only build with C++ |
| 353 | */ |
| 354 | #ifdef __cplusplus |
| 355 | |
| 356 | /** Faster than SkToBool for integral conditions. Returns 0 or 1 |
| 357 | */ |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 358 | static inline int Sk32ToBool(uint32_t n) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 359 | return (n | (0-n)) >> 31; |
| 360 | } |
| 361 | |
bsalomon@google.com | ff43661 | 2013-02-27 19:07:32 +0000 | [diff] [blame] | 362 | /** Generic swap function. Classes with efficient swaps should specialize this function to take |
| 363 | their fast path. This function is used by SkTSort. */ |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 364 | template <typename T> inline void SkTSwap(T& a, T& b) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 365 | T c(a); |
| 366 | a = b; |
| 367 | b = c; |
| 368 | } |
| 369 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 370 | static inline int32_t SkAbs32(int32_t value) { |
mtklein | 09a22e9 | 2014-11-21 11:38:53 -0800 | [diff] [blame] | 371 | SkASSERT(value != SK_NaN32); // The most negative int32_t can't be negated. |
commit-bot@chromium.org | 38bad32 | 2013-07-30 13:16:29 +0000 | [diff] [blame] | 372 | if (value < 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 373 | value = -value; |
commit-bot@chromium.org | 38bad32 | 2013-07-30 13:16:29 +0000 | [diff] [blame] | 374 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 375 | return value; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 376 | } |
| 377 | |
reed@google.com | 2b57dc6 | 2013-01-08 13:23:32 +0000 | [diff] [blame] | 378 | template <typename T> inline T SkTAbs(T value) { |
| 379 | if (value < 0) { |
| 380 | value = -value; |
| 381 | } |
| 382 | return value; |
| 383 | } |
| 384 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 385 | static inline int32_t SkMax32(int32_t a, int32_t b) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 386 | if (a < b) |
| 387 | a = b; |
| 388 | return a; |
| 389 | } |
| 390 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 391 | static inline int32_t SkMin32(int32_t a, int32_t b) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 392 | if (a > b) |
| 393 | a = b; |
| 394 | return a; |
| 395 | } |
| 396 | |
caryclark@google.com | 3b97af5 | 2013-04-23 11:56:44 +0000 | [diff] [blame] | 397 | template <typename T> const T& SkTMin(const T& a, const T& b) { |
| 398 | return (a < b) ? a : b; |
| 399 | } |
| 400 | |
| 401 | template <typename T> const T& SkTMax(const T& a, const T& b) { |
| 402 | return (b < a) ? a : b; |
| 403 | } |
| 404 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 405 | static inline int32_t SkSign32(int32_t a) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 406 | return (a >> 31) | ((unsigned) -a >> 31); |
| 407 | } |
| 408 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 409 | static inline int32_t SkFastMin32(int32_t value, int32_t max) { |
commit-bot@chromium.org | 38bad32 | 2013-07-30 13:16:29 +0000 | [diff] [blame] | 410 | if (value > max) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 411 | value = max; |
commit-bot@chromium.org | 38bad32 | 2013-07-30 13:16:29 +0000 | [diff] [blame] | 412 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 413 | return value; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 414 | } |
| 415 | |
bungeman | fd0ecf4 | 2015-04-16 12:18:28 -0700 | [diff] [blame] | 416 | template <typename T> static inline const T& SkTPin(const T& x, const T& min, const T& max) { |
| 417 | return SkTMax(SkTMin(x, max), min); |
| 418 | } |
| 419 | |
| 420 | /** Returns signed 32 bit value pinned between min and max, inclusively. */ |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 421 | static inline int32_t SkPin32(int32_t value, int32_t min, int32_t max) { |
bungeman | fd0ecf4 | 2015-04-16 12:18:28 -0700 | [diff] [blame] | 422 | return SkTPin(value, min, max); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 423 | } |
| 424 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 425 | static inline uint32_t SkSetClearShift(uint32_t bits, bool cond, |
| 426 | unsigned shift) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 427 | SkASSERT((int)cond == 0 || (int)cond == 1); |
| 428 | return (bits & ~(1 << shift)) | ((int)cond << shift); |
| 429 | } |
| 430 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 431 | static inline uint32_t SkSetClearMask(uint32_t bits, bool cond, |
| 432 | uint32_t mask) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 433 | return cond ? bits | mask : bits & ~mask; |
| 434 | } |
| 435 | |
reed@google.com | 1fcd51e | 2011-01-05 15:50:27 +0000 | [diff] [blame] | 436 | /////////////////////////////////////////////////////////////////////////////// |
| 437 | |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 438 | /** Use to combine multiple bits in a bitmask in a type safe way. |
| 439 | */ |
| 440 | template <typename T> |
| 441 | T SkTBitOr(T a, T b) { |
| 442 | return (T)(a | b); |
| 443 | } |
| 444 | |
reed@google.com | 1fcd51e | 2011-01-05 15:50:27 +0000 | [diff] [blame] | 445 | /** |
| 446 | * Use to cast a pointer to a different type, and maintaining strict-aliasing |
| 447 | */ |
| 448 | template <typename Dst> Dst SkTCast(const void* ptr) { |
| 449 | union { |
| 450 | const void* src; |
| 451 | Dst dst; |
| 452 | } data; |
| 453 | data.src = ptr; |
| 454 | return data.dst; |
| 455 | } |
| 456 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 457 | ////////////////////////////////////////////////////////////////////////////// |
| 458 | |
| 459 | /** \class SkNoncopyable |
| 460 | |
fmalita | 055f6b5 | 2015-04-09 08:49:32 -0700 | [diff] [blame] | 461 | SkNoncopyable is the base class for objects that do not want to |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 462 | be copied. It hides its copy-constructor and its assignment-operator. |
| 463 | */ |
ctguil@chromium.org | 7ffb1b2 | 2011-03-15 21:27:08 +0000 | [diff] [blame] | 464 | class SK_API SkNoncopyable { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 465 | public: |
| 466 | SkNoncopyable() {} |
reed@google.com | 1fcd51e | 2011-01-05 15:50:27 +0000 | [diff] [blame] | 467 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 468 | private: |
| 469 | SkNoncopyable(const SkNoncopyable&); |
| 470 | SkNoncopyable& operator=(const SkNoncopyable&); |
| 471 | }; |
| 472 | |
| 473 | class SkAutoFree : SkNoncopyable { |
| 474 | public: |
| 475 | SkAutoFree() : fPtr(NULL) {} |
| 476 | explicit SkAutoFree(void* ptr) : fPtr(ptr) {} |
| 477 | ~SkAutoFree() { sk_free(fPtr); } |
reed@google.com | 1fcd51e | 2011-01-05 15:50:27 +0000 | [diff] [blame] | 478 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 479 | /** Return the currently allocate buffer, or null |
| 480 | */ |
| 481 | void* get() const { return fPtr; } |
| 482 | |
| 483 | /** Assign a new ptr allocated with sk_malloc (or null), and return the |
| 484 | previous ptr. Note it is the caller's responsibility to sk_free the |
| 485 | returned ptr. |
| 486 | */ |
| 487 | void* set(void* ptr) { |
| 488 | void* prev = fPtr; |
| 489 | fPtr = ptr; |
| 490 | return prev; |
| 491 | } |
reed@google.com | 1fcd51e | 2011-01-05 15:50:27 +0000 | [diff] [blame] | 492 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 493 | /** Transfer ownership of the current ptr to the caller, setting the |
| 494 | internal reference to null. Note the caller is reponsible for calling |
| 495 | sk_free on the returned address. |
| 496 | */ |
| 497 | void* detach() { return this->set(NULL); } |
| 498 | |
| 499 | /** Free the current buffer, and set the internal reference to NULL. Same |
| 500 | as calling sk_free(detach()) |
| 501 | */ |
| 502 | void free() { |
| 503 | sk_free(fPtr); |
| 504 | fPtr = NULL; |
| 505 | } |
| 506 | |
| 507 | private: |
| 508 | void* fPtr; |
| 509 | // illegal |
| 510 | SkAutoFree(const SkAutoFree&); |
| 511 | SkAutoFree& operator=(const SkAutoFree&); |
| 512 | }; |
commit-bot@chromium.org | e61a86c | 2013-11-18 16:03:59 +0000 | [diff] [blame] | 513 | #define SkAutoFree(...) SK_REQUIRE_LOCAL_VAR(SkAutoFree) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 514 | |
bsalomon@google.com | 7d4679a | 2011-09-02 22:06:24 +0000 | [diff] [blame] | 515 | /** |
| 516 | * Manage an allocated block of heap memory. This object is the sole manager of |
| 517 | * the lifetime of the block, so the caller must not call sk_free() or delete |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 518 | * on the block, unless detach() was called. |
bsalomon@google.com | 7d4679a | 2011-09-02 22:06:24 +0000 | [diff] [blame] | 519 | */ |
commit-bot@chromium.org | e3beb6b | 2014-04-07 19:34:38 +0000 | [diff] [blame] | 520 | class SkAutoMalloc : SkNoncopyable { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 521 | public: |
reed@google.com | 3ab4195 | 2011-10-18 18:32:46 +0000 | [diff] [blame] | 522 | explicit SkAutoMalloc(size_t size = 0) { |
| 523 | fPtr = size ? sk_malloc_throw(size) : NULL; |
bsalomon@google.com | 7d4679a | 2011-09-02 22:06:24 +0000 | [diff] [blame] | 524 | fSize = size; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 525 | } |
bsalomon@google.com | 7d4679a | 2011-09-02 22:06:24 +0000 | [diff] [blame] | 526 | |
| 527 | ~SkAutoMalloc() { |
| 528 | sk_free(fPtr); |
| 529 | } |
| 530 | |
| 531 | /** |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 532 | * Passed to reset to specify what happens if the requested size is smaller |
| 533 | * than the current size (and the current block was dynamically allocated). |
| 534 | */ |
| 535 | enum OnShrink { |
| 536 | /** |
| 537 | * If the requested size is smaller than the current size, and the |
| 538 | * current block is dynamically allocated, free the old block and |
| 539 | * malloc a new block of the smaller size. |
| 540 | */ |
| 541 | kAlloc_OnShrink, |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 542 | |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 543 | /** |
| 544 | * If the requested size is smaller than the current size, and the |
| 545 | * current block is dynamically allocated, just return the old |
| 546 | * block. |
| 547 | */ |
tomhudson@google.com | 1f90287 | 2012-06-01 13:15:47 +0000 | [diff] [blame] | 548 | kReuse_OnShrink |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 549 | }; |
| 550 | |
| 551 | /** |
bsalomon@google.com | 7d4679a | 2011-09-02 22:06:24 +0000 | [diff] [blame] | 552 | * Reallocates the block to a new size. The ptr may or may not change. |
| 553 | */ |
bsalomon@google.com | 9eb6645 | 2013-05-22 13:35:37 +0000 | [diff] [blame] | 554 | void* reset(size_t size, OnShrink shrink = kAlloc_OnShrink, bool* didChangeAlloc = NULL) { |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 555 | if (size == fSize || (kReuse_OnShrink == shrink && size < fSize)) { |
bsalomon | 49f085d | 2014-09-05 13:34:00 -0700 | [diff] [blame] | 556 | if (didChangeAlloc) { |
bsalomon@google.com | 9eb6645 | 2013-05-22 13:35:37 +0000 | [diff] [blame] | 557 | *didChangeAlloc = false; |
| 558 | } |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 559 | return fPtr; |
bsalomon@google.com | 7d4679a | 2011-09-02 22:06:24 +0000 | [diff] [blame] | 560 | } |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 561 | |
| 562 | sk_free(fPtr); |
| 563 | fPtr = size ? sk_malloc_throw(size) : NULL; |
| 564 | fSize = size; |
bsalomon | 49f085d | 2014-09-05 13:34:00 -0700 | [diff] [blame] | 565 | if (didChangeAlloc) { |
bsalomon@google.com | 9eb6645 | 2013-05-22 13:35:37 +0000 | [diff] [blame] | 566 | *didChangeAlloc = true; |
| 567 | } |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 568 | |
bsalomon@google.com | 7d4679a | 2011-09-02 22:06:24 +0000 | [diff] [blame] | 569 | return fPtr; |
| 570 | } |
| 571 | |
| 572 | /** |
| 573 | * Releases the block back to the heap |
| 574 | */ |
| 575 | void free() { |
| 576 | this->reset(0); |
| 577 | } |
| 578 | |
| 579 | /** |
| 580 | * Return the allocated block. |
| 581 | */ |
| 582 | void* get() { return fPtr; } |
| 583 | const void* get() const { return fPtr; } |
| 584 | |
bsalomon@google.com | 6dcd27c | 2011-09-06 15:02:33 +0000 | [diff] [blame] | 585 | /** Transfer ownership of the current ptr to the caller, setting the |
| 586 | internal reference to null. Note the caller is reponsible for calling |
| 587 | sk_free on the returned address. |
| 588 | */ |
| 589 | void* detach() { |
| 590 | void* ptr = fPtr; |
| 591 | fPtr = NULL; |
| 592 | fSize = 0; |
| 593 | return ptr; |
| 594 | } |
| 595 | |
bsalomon@google.com | 7d4679a | 2011-09-02 22:06:24 +0000 | [diff] [blame] | 596 | private: |
| 597 | void* fPtr; |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 598 | size_t fSize; // can be larger than the requested size (see kReuse) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 599 | }; |
commit-bot@chromium.org | e61a86c | 2013-11-18 16:03:59 +0000 | [diff] [blame] | 600 | #define SkAutoMalloc(...) SK_REQUIRE_LOCAL_VAR(SkAutoMalloc) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 601 | |
reed@google.com | 63a6060 | 2011-03-10 13:07:35 +0000 | [diff] [blame] | 602 | /** |
| 603 | * Manage an allocated block of memory. If the requested size is <= kSize, then |
| 604 | * the allocation will come from the stack rather than the heap. This object |
| 605 | * is the sole manager of the lifetime of the block, so the caller must not |
| 606 | * call sk_free() or delete on the block. |
| 607 | */ |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 608 | template <size_t kSize> class SkAutoSMalloc : SkNoncopyable { |
| 609 | public: |
reed@google.com | 63a6060 | 2011-03-10 13:07:35 +0000 | [diff] [blame] | 610 | /** |
| 611 | * Creates initially empty storage. get() returns a ptr, but it is to |
bsalomon@google.com | 7d4679a | 2011-09-02 22:06:24 +0000 | [diff] [blame] | 612 | * a zero-byte allocation. Must call reset(size) to return an allocated |
reed@google.com | 63a6060 | 2011-03-10 13:07:35 +0000 | [diff] [blame] | 613 | * block. |
| 614 | */ |
| 615 | SkAutoSMalloc() { |
| 616 | fPtr = fStorage; |
bsalomon@google.com | 9eb6645 | 2013-05-22 13:35:37 +0000 | [diff] [blame] | 617 | fSize = kSize; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 618 | } |
reed@google.com | 63a6060 | 2011-03-10 13:07:35 +0000 | [diff] [blame] | 619 | |
| 620 | /** |
| 621 | * Allocate a block of the specified size. If size <= kSize, then the |
| 622 | * allocation will come from the stack, otherwise it will be dynamically |
| 623 | * allocated. |
| 624 | */ |
| 625 | explicit SkAutoSMalloc(size_t size) { |
| 626 | fPtr = fStorage; |
bsalomon@google.com | 9eb6645 | 2013-05-22 13:35:37 +0000 | [diff] [blame] | 627 | fSize = kSize; |
bsalomon@google.com | 7d4679a | 2011-09-02 22:06:24 +0000 | [diff] [blame] | 628 | this->reset(size); |
reed@google.com | 63a6060 | 2011-03-10 13:07:35 +0000 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | /** |
| 632 | * Free the allocated block (if any). If the block was small enought to |
| 633 | * have been allocated on the stack (size <= kSize) then this does nothing. |
| 634 | */ |
| 635 | ~SkAutoSMalloc() { |
| 636 | if (fPtr != (void*)fStorage) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 637 | sk_free(fPtr); |
reed@google.com | 63a6060 | 2011-03-10 13:07:35 +0000 | [diff] [blame] | 638 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 639 | } |
reed@google.com | 63a6060 | 2011-03-10 13:07:35 +0000 | [diff] [blame] | 640 | |
| 641 | /** |
| 642 | * Return the allocated block. May return non-null even if the block is |
| 643 | * of zero size. Since this may be on the stack or dynamically allocated, |
| 644 | * the caller must not call sk_free() on it, but must rely on SkAutoSMalloc |
| 645 | * to manage it. |
| 646 | */ |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 647 | void* get() const { return fPtr; } |
reed@google.com | 63a6060 | 2011-03-10 13:07:35 +0000 | [diff] [blame] | 648 | |
| 649 | /** |
| 650 | * Return a new block of the requested size, freeing (as necessary) any |
| 651 | * previously allocated block. As with the constructor, if size <= kSize |
| 652 | * then the return block may be allocated locally, rather than from the |
| 653 | * heap. |
| 654 | */ |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 655 | void* reset(size_t size, |
bsalomon@google.com | 9eb6645 | 2013-05-22 13:35:37 +0000 | [diff] [blame] | 656 | SkAutoMalloc::OnShrink shrink = SkAutoMalloc::kAlloc_OnShrink, |
| 657 | bool* didChangeAlloc = NULL) { |
| 658 | size = (size < kSize) ? kSize : size; |
robertphillips@google.com | 0f2b195 | 2013-05-23 14:59:40 +0000 | [diff] [blame] | 659 | bool alloc = size != fSize && (SkAutoMalloc::kAlloc_OnShrink == shrink || size > fSize); |
bsalomon | 49f085d | 2014-09-05 13:34:00 -0700 | [diff] [blame] | 660 | if (didChangeAlloc) { |
bsalomon@google.com | 9eb6645 | 2013-05-22 13:35:37 +0000 | [diff] [blame] | 661 | *didChangeAlloc = alloc; |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 662 | } |
bsalomon@google.com | 9eb6645 | 2013-05-22 13:35:37 +0000 | [diff] [blame] | 663 | if (alloc) { |
| 664 | if (fPtr != (void*)fStorage) { |
| 665 | sk_free(fPtr); |
| 666 | } |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 667 | |
bsalomon@google.com | 9eb6645 | 2013-05-22 13:35:37 +0000 | [diff] [blame] | 668 | if (size == kSize) { |
| 669 | SkASSERT(fPtr != fStorage); // otherwise we lied when setting didChangeAlloc. |
| 670 | fPtr = fStorage; |
| 671 | } else { |
| 672 | fPtr = sk_malloc_flags(size, SK_MALLOC_THROW | SK_MALLOC_TEMP); |
| 673 | } |
reed@google.com | 63a6060 | 2011-03-10 13:07:35 +0000 | [diff] [blame] | 674 | |
bsalomon@google.com | 9eb6645 | 2013-05-22 13:35:37 +0000 | [diff] [blame] | 675 | fSize = size; |
reed@google.com | 63a6060 | 2011-03-10 13:07:35 +0000 | [diff] [blame] | 676 | } |
bsalomon@google.com | 9eb6645 | 2013-05-22 13:35:37 +0000 | [diff] [blame] | 677 | SkASSERT(fSize >= size && fSize >= kSize); |
| 678 | SkASSERT((fPtr == fStorage) || fSize > kSize); |
reed@google.com | 63a6060 | 2011-03-10 13:07:35 +0000 | [diff] [blame] | 679 | return fPtr; |
| 680 | } |
| 681 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 682 | private: |
| 683 | void* fPtr; |
reed@google.com | 1c401d8 | 2011-10-18 18:52:03 +0000 | [diff] [blame] | 684 | size_t fSize; // can be larger than the requested size (see kReuse) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 685 | uint32_t fStorage[(kSize + 3) >> 2]; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 686 | }; |
commit-bot@chromium.org | e61a86c | 2013-11-18 16:03:59 +0000 | [diff] [blame] | 687 | // Can't guard the constructor because it's a template class. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 688 | |
| 689 | #endif /* C++ */ |
| 690 | |
| 691 | #endif |