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ImageData: remove automatic mutex locks.

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This commit is contained in:
Sasha Szpakowski
2024-02-18 17:06:40 -04:00
parent d880c48502
commit 007090af14
9 changed files with 25 additions and 123 deletions
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src/modules/image/ImageData.cpp
-10
View File
@@ -194,10 +194,7 @@ love::filesystem::FileData *ImageData::encode(FormatHandler::EncodedFormat encod
}
if (encoder != nullptr)
{
thread::Lock lock(mutex);
encodedimage = encoder->encode(rawimage, encodedFormat);
}
if (encoder == nullptr || encodedimage.data == nullptr)
throw love::Exception("No suitable image encoder for the %s pixel format.", getPixelFormatName(format));
@@ -537,8 +534,6 @@ void ImageData::setPixel(int x, int y, const Colorf &c)
if (pixelSetFunction == nullptr)
throw love::Exception("ImageData:setPixel does not currently support the %s pixel format.", getPixelFormatName(format));
Lock lock(mutex);
pixelSetFunction(c, p);
}
@@ -553,8 +548,6 @@ void ImageData::getPixel(int x, int y, Colorf &c) const
if (pixelGetFunction == nullptr)
throw love::Exception("ImageData:getPixel does not currently support the %s pixel format.", getPixelFormatName(format));
Lock lock(mutex);
pixelGetFunction(p, c);
}
@@ -701,9 +694,6 @@ void ImageData::paste(ImageData *src, int dx, int dy, int sx, int sy, int sw, in
if (sy + sh > srcH)
sh = srcH - sy;
Lock lock2(src->mutex);
Lock lock1(mutex);
uint8 *s = (uint8 *) src->getData();
uint8 *d = (uint8 *) getData();
src/modules/image/wrap_ImageData.cpp
+6 -50
View File
@@ -158,18 +158,15 @@ int w_ImageData_setPixel(lua_State *L)
return 0;
}
// ImageData:mapPixel. Not thread-safe! See wrap_ImageData.lua for the thread-
// safe wrapper function.
int w_ImageData__mapPixelUnsafe(lua_State *L)
int w_ImageData_mapPixel(lua_State *L)
{
ImageData *t = luax_checkimagedata(L, 1);
luaL_checktype(L, 2, LUA_TFUNCTION);
// No optints because we assume they're done in the wrapper function.
int sx = (int) lua_tonumber(L, 3);
int sy = (int) lua_tonumber(L, 4);
int w = (int) lua_tonumber(L, 5);
int h = (int) lua_tonumber(L, 6);
int sx = luaL_optint(L, 3, 0);
int sy = luaL_optint(L, 4, 0);
int w = luaL_optint(L, 5, t->getWidth());
int h = luaL_optint(L, 6, t->getHeight());
if (!(t->inside(sx, sy) && t->inside(sx+w-1, sy+h-1)))
return luaL_error(L, "Invalid rectangle dimensions.");
@@ -264,32 +261,9 @@ int w_ImageData_encode(lua_State *L)
return 1;
}
int w_ImageData__performAtomic(lua_State *L)
{
ImageData *t = luax_checkimagedata(L, 1);
int err = 0;
{
love::thread::Lock lock(t->getMutex());
// call the function, passing any user-specified arguments.
err = lua_pcall(L, lua_gettop(L) - 2, LUA_MULTRET, 0);
}
// Unfortunately, this eats the stack trace, too bad.
if (err != 0)
return lua_error(L);
// The function and everything after it in the stack are eaten by the pcall,
// leaving only the ImageData object. Everything else is a return value.
return lua_gettop(L) - 1;
}
// C functions in a struct, necessary for the FFI versions of ImageData methods.
struct FFI_ImageData
{
void (*lockMutex)(Proxy *p);
void (*unlockMutex)(Proxy *p);
float (*float16to32)(float16 f);
float16 (*float32to16)(float f);
@@ -302,20 +276,6 @@ struct FFI_ImageData
static FFI_ImageData ffifuncs =
{
[](Proxy *p) // lockMutex
{
// We don't do any type-checking for the Proxy here since these functions
// are always called from code which has already done type checking.
ImageData *i = (ImageData *) p->object;
i->getMutex()->lock();
},
[](Proxy *p) // unlockMutex
{
ImageData *i = (ImageData *) p->object;
i->getMutex()->unlock();
},
float16to32,
float32to16,
float11to32,
@@ -336,12 +296,8 @@ static const luaL_Reg w_ImageData_functions[] =
{ "getPixel", w_ImageData_getPixel },
{ "setPixel", w_ImageData_setPixel },
{ "paste", w_ImageData_paste },
{ "mapPixel", w_ImageData_mapPixel },
{ "encode", w_ImageData_encode },
// Used in the Lua wrapper code.
{ "_mapPixelUnsafe", w_ImageData__mapPixelUnsafe },
{ "_performAtomic", w_ImageData__performAtomic },
{ 0, 0 }
};
src/modules/image/wrap_ImageData.lua
+15 -44
View File
@@ -38,29 +38,6 @@ local function clamp01(x)
return min(max(x, 0), 1)
end
-- Implement thread-safe ImageData:mapPixel regardless of whether the FFI is
-- used or not.
function ImageData:mapPixel(func, ix, iy, iw, ih)
local idw, idh = self:getDimensions()
ix = ix or 0
iy = iy or 0
iw = iw or idw
ih = ih or idh
if type(ix) ~= "number" then error("bad argument #2 to ImageData:mapPixel (expected number)", 2) end
if type(iy) ~= "number" then error("bad argument #3 to ImageData:mapPixel (expected number)", 2) end
if type(iw) ~= "number" then error("bad argument #4 to ImageData:mapPixel (expected number)", 2) end
if type(ih) ~= "number" then error("bad argument #5 to ImageData:mapPixel (expected number)", 2) end
if type(func) ~= "function" then error("bad argument #1 to ImageData:mapPixel (expected function)", 2) end
if not (inside(ix, iy, idw, idh) and inside(ix+iw-1, iy+ih-1, idw, idh)) then error("Invalid rectangle dimensions", 2) end
-- performAtomic and mapPixelUnsafe have Lua-C API and FFI versions.
self:_performAtomic(self._mapPixelUnsafe, self, func, ix, iy, iw, ih)
end
-- Everything below this point is efficient FFI replacements for existing
-- ImageData functionality.
@@ -84,9 +61,6 @@ typedef uint16_t float10;
typedef struct FFI_ImageData
{
void (*lockMutex)(Proxy *p);
void (*unlockMutex)(Proxy *p);
float (*float16to32)(float16 f);
float16 (*float32to16)(float f);
@@ -381,20 +355,23 @@ local objectcache = setmetatable({}, {
-- Overwrite existing functions with new FFI versions.
function ImageData:_performAtomic(...)
ffifuncs.lockMutex(self)
local success, err = pcall(...)
ffifuncs.unlockMutex(self)
if not success then
error(err, 3)
end
end
function ImageData:_mapPixelUnsafe(func, ix, iy, iw, ih)
function ImageData:mapPixel(func, ix, iy, iw, ih)
local p = objectcache[self]
local idw, idh = p.width, p.height
ix = ix or 0
iy = iy or 0
iw = iw or idw
ih = ih or idh
if type(ix) ~= "number" then error("bad argument #2 to ImageData:mapPixel (expected number)", 2) end
if type(iy) ~= "number" then error("bad argument #3 to ImageData:mapPixel (expected number)", 2) end
if type(iw) ~= "number" then error("bad argument #4 to ImageData:mapPixel (expected number)", 2) end
if type(ih) ~= "number" then error("bad argument #5 to ImageData:mapPixel (expected number)", 2) end
if type(func) ~= "function" then error("bad argument #1 to ImageData:mapPixel (expected function)", 2) end
if not (inside(ix, iy, idw, idh) and inside(ix+iw-1, iy+ih-1, idw, idh)) then error("Invalid rectangle dimensions", 2) end
if p.pointer == nil then error("ImageData:mapPixel does not currently support the "..p.format.." pixel format.", 2) end
ix = floor(ix)
@@ -427,12 +404,8 @@ function ImageData:getPixel(x, y)
if p.pointer == nil then error("ImageData:getPixel does not currently support the "..p.format.." pixel format.", 2) end
ffifuncs.lockMutex(self)
local pixel = p.pointer[y * p.width + x]
local r, g, b, a = p.tolua(pixel)
ffifuncs.unlockMutex(self)
return r, g, b, a
return p.tolua(pixel)
end
function ImageData:setPixel(x, y, r, g, b, a)
@@ -457,9 +430,7 @@ function ImageData:setPixel(x, y, r, g, b, a)
if p.pointer == nil then error("ImageData:setPixel does not currently support the "..p.format.." pixel format.", 2) end
ffifuncs.lockMutex(self)
p.fromlua(p.pointer[y * p.width + x], r, g, b, a)
ffifuncs.unlockMutex(self)
end
function ImageData:getWidth()