cee_scape/
glibc_compat.rs

1use std::marker::PhantomData;
2
3/// `JmpBufFields` are the accessible fields when viewed via a JmpBuf pointer.
4/// But also: You shouldn't be poking at these!
5#[repr(C)]
6pub struct JmpBufFields {
7    _buf: [u64; 8],
8    _neither_send_nor_sync: PhantomData<*const u8>,
9}
10
11/// `SigJmpBufFields` are the accessible fields when viewed via a SigJmpBuf pointer.
12/// But also: You shouldn't be poking at these!
13#[repr(C)]
14pub struct SigJmpBufFields {
15    // This *must* be the first field. We allow `SigJmpBuf` to be transmuted to
16    // a `JmpBuf` and then back again depending on the host libc. (e.g. glibc
17    // has setjmp as a shallow wrapper around sigsetjmp, and will write to
18    // fields past the `__jmp_buf`).
19    __jmp_buf: JmpBufFields,
20    __mask_was_saved: isize,
21    __saved_mask: libc::sigset_t,
22}
23
24/// This is the type you use to allocate a JmpBuf on the stack.
25/// (Glibc puns the two.)
26pub type JmpBufStruct = SigJmpBufFields;
27
28/// This is the type you use to allocate a SigJmpBuf on the stack.
29pub type SigJmpBufStruct = SigJmpBufFields;
cee_scape/glibc_compat.rs

cee_scape/
glibc_compat.rs
