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sagemathinc
GitHub Repository: sagemathinc/wapython
 Path: blob/main/core/sqlite/src/patches/00-syscall.patch
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diff --git a/src/os_unix.c b/src/os_unix.c

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index b933de3..61490f2 100644

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--- a/src/os_unix.c

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+++ b/src/os_unix.c

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@@ -549,6 +549,67 @@ static struct unix_syscall {

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 }; /* End of the overrideable system calls */

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+// WebAssembly note: these overrideable system calls are not possible with

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+// webassembly **with performance** since you'll just get the error

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+// "null function or function signature mismatch" since WASM doesn't allow

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+// incompatible signatures with functions.  I think emscripten/pyodide gets

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+// around this by proxying the call through Javascript, rather than using

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+// a direct function pointer from the WASM function pointer table.  However,

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+// in my benchmarks, that can be a 100x performance penalty, so not a good option.

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+// We don't need overrideable system calls anyways, so we just undo the above.

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+

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+#undef osOpen

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+#define osOpen open

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+#undef osClose

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+#define osClose close

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+#undef osAccess

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+#define osAccess access

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+#undef osGetcwd

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+#define osGetcwd getcwd

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+#undef osStat

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+#define osStat stat

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+#undef osFstat

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+#define osFstat fstat

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+#undef osFtruncate

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+#define osFtruncate ftruncate

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+#undef osFcntl

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+#define osFcntl fcntl

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+#undef osRead

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+#define osRead read

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+#undef osPread

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+#define osPread pread

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+#undef osPread64

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+#define osPread64 pread64

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+#undef osWrite

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+#define osWrite write

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+#undef osPwrite

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+#define osPwrite pwrite

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+#undef osPwrite64

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+#define osPwrite64 pwrite64

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+#undef osFchmod

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+#define osFchmod fchmod

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+#undef osFallocate

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+#define osFallocate fallocate

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+#undef osUnlink

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+#define osUnlink unlink

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+#undef osOpendirectory

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+#define osOpendirectory openDirectory

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+#undef osMkdir

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+#define osMkdir mkdir

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+#undef osRmdir

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+#define osRmdir rmdir

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+#undef osFchown

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+#define osFchown fchown

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+#undef osGeteuid

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+#define osGeteuid geteuid

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+#undef osReadlink

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+#define osReadlink readlink

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+#undef osLstat

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+#define osLstat lstat

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+#undef osIoctl

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+#define osIoctl ioctl

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+

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+

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