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Merge pull request #5403 from flysand7/shmget-interface

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sys/linux: Unify IPC_Flags and IPC_Mode bitsets
This commit is contained in:
Jeroen van Rijn
2025-06-24 11:39:36 +02:00
committed by GitHub
parent 8d89b1a448 e21cde0cf7
commit 19d5d377df
2 changed files with 21 additions and 23 deletions
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33
core/sys/linux/bits.odin
View File

@@ -1618,36 +1618,39 @@ PER_HPUX :: 0x0010
PER_MASK :: 0x00ff
/*
Bits for access modes for shared memory
Bits for SystemV IPC flags.
In this enum, access modes are common for any shared memory. Prefixed
entries (i.e. `IPC_` or `SHM_`) denote flags, where `IPC_` are common flags
for all SystemV IPC primitives, and `SHM_`, `SEM_` and `MSG_` are specific
to shared memory segments, semaphores and message queues respectively.
These bits overlap, because they are meant to be used within the
context of specific procedures. Creation flags, used for `*get` procedures,
and usage flags used by all other IPC procedures. Do not mix creation and
usage flags, as well as flags prefixed differently (excluding `IPC_`
prefix).
*/
IPC_Mode_Bits :: enum {
IPC_Flags_Bits :: enum {
// Access modes for shared memory.
WROTH = 1,
RDOTH = 2,
WRGRP = 4,
RDGRP = 5,
WRUSR = 7,
RDUSR = 8,
DEST = 9,
LOCKED = 10,
}
/*
Shared memory flags bits
*/
IPC_Flags_Bits :: enum {
// Creation flags for shared memory.
IPC_CREAT = 9,
IPC_EXCL = 10,
IPC_NOWAIT = 11,
// Semaphore
SEM_UNDO = 9,
// Shared memory
SHM_HUGETLB = 11,
SHM_NORESERVE = 12,
// Usage flags for shared memory.
IPC_NOWAIT = 11,
SEM_UNDO = 9,
SHM_RDONLY = 12,
SHM_RND = 13,
SHM_REMAP = 14,
SHM_EXEC = 15,
// Message queue
MSG_NOERROR = 12,
MSG_EXCEPT = 13,
MSG_COPY = 14,

11
core/sys/linux/types.odin
View File

@@ -937,17 +937,12 @@ IO_Vec :: struct {
}
/*
Access mode for shared memory
*/
IPC_Mode :: bit_set[IPC_Mode_Bits; u32]
/*
Flags used by IPC objects
Access modes and flags used by SystemV IPC procedures.
*/
IPC_Flags :: bit_set[IPC_Flags_Bits; i16]
/*
Permissions for IPC objects
Permissions for SystemV IPC primitives.
*/
IPC_Perm :: struct {
key: Key,
@@ -955,7 +950,7 @@ IPC_Perm :: struct {
gid: u32,
cuid: u32,
cgid: u32,
mode: IPC_Mode,
mode: IPC_Flags, // Only contains mode flags.
seq: u16,
_: [2 + 2*size_of(int)]u8,
}