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Implement a fallback mechanism for posix_memalign

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Do the alignment dance by ourselves whenever posix_memalign is not
available.
Don't try to use malloc as it has too many edge cases, figuring out
whether a block of memory is manually aligned by the mechanism above or
is directly coming from malloc becomes too hard to be valuable.
This commit is contained in:
LemonBoy
2020-09-22 13:18:40 +02:00
parent 4664eae1e4
commit 53433cdea2
9 changed files with 67 additions and 47 deletions
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2
lib/std/c/linux.zig
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@@ -101,6 +101,8 @@ pub extern "c" fn copy_file_range(fd_in: fd_t, off_in: ?*i64, fd_out: fd_t, off_
pub extern "c" fn signalfd(fd: fd_t, mask: *const sigset_t, flags: c_uint) c_int;
pub extern "c" fn prlimit(pid: pid_t, resource: rlimit_resource, new_limit: *const rlimit, old_limit: *rlimit) c_int;
pub extern "c" fn posix_memalign(memptr: *?*c_void, alignment: usize, size: usize) c_int;
pub extern "c" fn malloc_usable_size(?*const c_void) usize;
pub const pthread_attr_t = extern struct {
__size: [56]u8,