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Merge pull request #3280 from beaumccartney/shm_syscalls

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add shm_open and shm_unlink syscalls for darwin
This commit is contained in:
Laytan
2024-08-15 17:08:41 +02:00
committed by GitHub
parent 6e91f6ab31 43e8da2e06
commit d91fa162d8
2 changed files with 58 additions and 16 deletions
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66
core/sys/darwin/xnu_system_call_helpers.odin
View File

@@ -91,6 +91,29 @@ _sys_permission_mode :: #force_inline proc (mode: Permission) -> u32 {
return cflags
}
_sys_open_mode :: #force_inline proc(mode: Open_Flags) -> u32 {
cflags : u32 = 0
cflags |= OPEN_FLAG_RDONLY * u32(Open_Flags.RDONLY in mode)
cflags |= OPEN_FLAG_WRONLY * u32(Open_Flags.WRONLY in mode)
cflags |= OPEN_FLAG_RDWR * u32(Open_Flags.RDWR in mode)
cflags |= OPEN_FLAG_NONBLOCK * u32(Open_Flags.NONBLOCK in mode)
cflags |= OPEN_FLAG_CREAT * u32(Open_Flags.CREAT in mode)
cflags |= OPEN_FLAG_APPEND * u32(Open_Flags.APPEND in mode)
cflags |= OPEN_FLAG_TRUNC * u32(Open_Flags.TRUNC in mode)
cflags |= OPEN_FLAG_EXCL * u32(Open_Flags.EXCL in mode)
cflags |= OPEN_FLAG_SHLOCK * u32(Open_Flags.SHLOCK in mode)
cflags |= OPEN_FLAG_EXLOCK * u32(Open_Flags.EXLOCK in mode)
cflags |= OPEN_FLAG_DIRECTORY * u32(Open_Flags.DIRECTORY in mode)
cflags |= OPEN_FLAG_NOFOLLOW * u32(Open_Flags.NOFOLLOW in mode)
cflags |= OPEN_FLAG_SYMLINK * u32(Open_Flags.SYMLINK in mode)
cflags |= OPEN_FLAG_EVTONLY * u32(Open_Flags.EVTONLY in mode)
cflags |= OPEN_FLAG_CLOEXEC * u32(Open_Flags.CLOEXEC in mode)
cflags |= OPEN_FLAG_NOFOLLOW_ANY * u32(Open_Flags.NOFOLLOW_ANY in mode)
return cflags
}
@(private)
clone_to_cstring :: proc(s: string, allocator: runtime.Allocator, loc := #caller_location) -> cstring {
c := make([]byte, len(s)+1, allocator, loc)
@@ -109,22 +132,7 @@ sys_open :: proc(path: string, oflag: Open_Flags, mode: Permission) -> (c.int, b
cflags = _sys_permission_mode(mode)
cmode |= OPEN_FLAG_RDONLY * u32(Open_Flags.RDONLY in oflag)
cmode |= OPEN_FLAG_WRONLY * u32(Open_Flags.WRONLY in oflag)
cmode |= OPEN_FLAG_RDWR * u32(Open_Flags.RDWR in oflag)
cmode |= OPEN_FLAG_NONBLOCK * u32(Open_Flags.NONBLOCK in oflag)
cmode |= OPEN_FLAG_CREAT * u32(Open_Flags.CREAT in oflag)
cmode |= OPEN_FLAG_APPEND * u32(Open_Flags.APPEND in oflag)
cmode |= OPEN_FLAG_TRUNC * u32(Open_Flags.TRUNC in oflag)
cmode |= OPEN_FLAG_EXCL * u32(Open_Flags.EXCL in oflag)
cmode |= OPEN_FLAG_SHLOCK * u32(Open_Flags.SHLOCK in oflag)
cmode |= OPEN_FLAG_EXLOCK * u32(Open_Flags.EXLOCK in oflag)
cmode |= OPEN_FLAG_DIRECTORY * u32(Open_Flags.DIRECTORY in oflag)
cmode |= OPEN_FLAG_NOFOLLOW * u32(Open_Flags.NOFOLLOW in oflag)
cmode |= OPEN_FLAG_SYMLINK * u32(Open_Flags.SYMLINK in oflag)
cmode |= OPEN_FLAG_EVTONLY * u32(Open_Flags.EVTONLY in oflag)
cmode |= OPEN_FLAG_CLOEXEC * u32(Open_Flags.CLOEXEC in oflag)
cmode |= OPEN_FLAG_NOFOLLOW_ANY * u32(Open_Flags.NOFOLLOW_ANY in oflag)
cmode = _sys_open_mode(oflag)
result := syscall_open(cpath, cmode, cflags)
state := result != -1
@@ -187,3 +195,29 @@ sys_lstat :: proc(path: string, status: ^stat) -> bool {
cpath: cstring = clone_to_cstring(path, context.temp_allocator)
return syscall_lstat(cpath, status) != -1
}
sys_shm_open :: proc(name: string, oflag: Open_Flags, mode: Permission) -> (c.int, bool) {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
cmode: u32 = 0
cflags: u32 = 0
cname: cstring = clone_to_cstring(name, context.temp_allocator)
cflags = _sys_permission_mode(mode)
cmode = _sys_open_mode(oflag)
result := syscall_shm_open(cname, cmode, cflags)
state := result != -1
// NOTE(beau): Presently fstat doesn't report any changed permissions
// on the file descriptor even with this fchmod (which fails with a
// non-zero return). I can also reproduce this with the syscalls in c
// so I suspect it's not odin's bug. I've left the fchmod in case the
// underlying issue is fixed.
if state && cflags != 0 {
state = (syscall_fchmod(result, cflags) != -1)
}
return result * cast(c.int)state, state
}

8
core/sys/darwin/xnu_system_call_wrappers.odin
View File

@@ -425,3 +425,11 @@ syscall_fchdir :: #force_inline proc "contextless" (fd: c.int, path: cstring) ->
syscall_getrusage :: #force_inline proc "contextless" (who: c.int, rusage: ^RUsage) -> c.int {
return cast(c.int) intrinsics.syscall(unix_offset_syscall(.getrusage), uintptr(who), uintptr(rusage))
}
syscall_shm_open :: #force_inline proc "contextless" (name: cstring, oflag: u32, mode: u32) -> c.int {
return cast(c.int)intrinsics.syscall(unix_offset_syscall(.shm_open), transmute(uintptr)name, uintptr(oflag), uintptr(mode))
}
syscall_shm_unlink :: #force_inline proc "contextless" (name: cstring) -> c.int {
return cast(c.int)intrinsics.syscall(unix_offset_syscall(.shm_unlink), transmute(uintptr)name)
}