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malloc fails on proper errors

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This commit is contained in:
MovingtoMars 2016-01-28 13:18:29 +13:00
parent 1a913f6bf2
commit 04b721d535
1 changed files with 21 additions and 5 deletions
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26
std/mem.zig
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@ -1,5 +1,6 @@
import "syscall.zig";
import "std.zig";
import "errno.zig";
pub fn malloc(bytes: isize) -> ?&u8 {
if (bytes > 4096) {
@ -7,13 +8,28 @@ pub fn malloc(bytes: isize) -> ?&u8 {
return null;
}
const result = mmap(0, 4096, MMAP_PROT_READ|MMAP_PROT_WRITE, MMAP_MAP_ANON|MMAP_MAP_SHARED, -1, 0);
const result = mmap(isize(0), 4096, MMAP_PROT_READ|MMAP_PROT_WRITE, MMAP_MAP_ANON|MMAP_MAP_SHARED, -1, 0);
if (result == -1) {
return null;
const failed: bool = switch (-result) {
0 => true,
EINVAL => true,
EACCES => true,
EAGAIN => true,
EBADF => true,
EMFILE => true,
ENODEV => true,
ENOMEM => true,
EOPNOTSUPP => true,
ENXIO => true,
EOVERFLOW => true,
else => false,
};
if (failed) {
null
} else {
(&u8)(result)
}
(&u8)(result)
}
pub fn free(ptr: &u8) {