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Fix ffi getting started example (#17)

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qwreey 2024-10-24 06:02:57 +00:00
parent 2d2848cb90
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16
pages/getting-started/2-introduction/11-ffi.mdx
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@ -23,17 +23,17 @@ Let's use this directly & file tree sturcture for our examples:
<details>
<summary>Show file contents</summary>
```c copy filename="external/lib.c"
```c copy filename="external/lib.c"
int addNumber(int a, int *b) {
return a + b;
return a + *b;
}
typedef int(*closure_t)(int, int);
typedef int(*closure_t)(int, int*);
int callClosure(closure_t closure) {
int b = 200;
return closure(100, &b) * 2;
}
```
```
</details>
@ -48,7 +48,7 @@ local ffi = require("@lune/ffi")
local c = ffi.c
--> Open dynamic library
local lib = ffi.open("./external/lib.c")
local lib = ffi.open("./external/lib.so")
--> Create function signature
local addNumberInfo = c.fn({ c.int, c.int:ptr() }, c.int)
@ -76,12 +76,12 @@ Note that All data is automatically freed by the garbage collector. If external
## Create closure from lua function
```lua copy filename="call.luau"
```lua copy filename="closure.luau"
local ffi = require("@lune/ffi")
local c = ffi.c
--> Open dynamic library
local lib = ffi.open("./external/lib.c")
local lib = ffi.open("./external/lib.so")
--> Create closure function signature
local closureInfo = c.fn({ c.int, c.int:ptr() }, c.int)
@ -111,5 +111,5 @@ callClosure(resultBox, closure:ref())
--> Read number from resultBox
local result = c.int:readData(resultBox)
print(result) -- 300
print(result) -- 600
```