445b03384a
* DirectAllocator does the underlying syscall for every allocation. * ArenaAllocator takes another allocator as an argument and allocates bytes up front, falling back to DirectAllocator with increasingly large allocation sizes, to avoid calling it too often. Then the entire arena can be freed at once. The self hosted parser is updated to take advantage of ArenaAllocator for the AST that it returns. This significantly reduces the complexity of cleanup code. docgen and build runner are updated to use the combination of ArenaAllocator and DirectAllocator instead of IncrementingAllocator, which is now deprecated in favor of FixedBufferAllocator combined with DirectAllocator. The C allocator calls aligned_alloc instead of malloc, in order to respect the alignment parameter. Added asserts in Allocator to ensure that implementors of the interface return slices of the correct size. Fixed a bug in Allocator when you call realloc to grow the allocation.
53 lines
2.7 KiB
Zig
53 lines
2.7 KiB
Zig
const builtin = @import("builtin");
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const Os = builtin.Os;
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pub use switch(builtin.os) {
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Os.linux => @import("linux.zig"),
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Os.windows => @import("windows.zig"),
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Os.macosx, Os.ios => @import("darwin.zig"),
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else => empty_import,
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};
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const empty_import = @import("../empty.zig");
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pub extern "c" fn abort() noreturn;
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pub extern "c" fn exit(code: c_int) noreturn;
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pub extern "c" fn isatty(fd: c_int) c_int;
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pub extern "c" fn close(fd: c_int) c_int;
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pub extern "c" fn fstat(fd: c_int, buf: &Stat) c_int;
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pub extern "c" fn @"fstat$INODE64"(fd: c_int, buf: &Stat) c_int;
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pub extern "c" fn lseek(fd: c_int, offset: isize, whence: c_int) isize;
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pub extern "c" fn open(path: &const u8, oflag: c_int, ...) c_int;
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pub extern "c" fn raise(sig: c_int) c_int;
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pub extern "c" fn read(fd: c_int, buf: &c_void, nbyte: usize) isize;
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pub extern "c" fn stat(noalias path: &const u8, noalias buf: &Stat) c_int;
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pub extern "c" fn write(fd: c_int, buf: &const c_void, nbyte: usize) isize;
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pub extern "c" fn mmap(addr: ?&c_void, len: usize, prot: c_int, flags: c_int,
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fd: c_int, offset: isize) ?&c_void;
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pub extern "c" fn munmap(addr: &c_void, len: usize) c_int;
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pub extern "c" fn unlink(path: &const u8) c_int;
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pub extern "c" fn getcwd(buf: &u8, size: usize) ?&u8;
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pub extern "c" fn waitpid(pid: c_int, stat_loc: &c_int, options: c_int) c_int;
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pub extern "c" fn fork() c_int;
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pub extern "c" fn pipe(fds: &c_int) c_int;
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pub extern "c" fn mkdir(path: &const u8, mode: c_uint) c_int;
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pub extern "c" fn symlink(existing: &const u8, new: &const u8) c_int;
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pub extern "c" fn rename(old: &const u8, new: &const u8) c_int;
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pub extern "c" fn chdir(path: &const u8) c_int;
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pub extern "c" fn execve(path: &const u8, argv: &const ?&const u8,
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envp: &const ?&const u8) c_int;
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pub extern "c" fn dup(fd: c_int) c_int;
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pub extern "c" fn dup2(old_fd: c_int, new_fd: c_int) c_int;
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pub extern "c" fn readlink(noalias path: &const u8, noalias buf: &u8, bufsize: usize) isize;
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pub extern "c" fn realpath(noalias file_name: &const u8, noalias resolved_name: &u8) ?&u8;
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pub extern "c" fn sigprocmask(how: c_int, noalias set: &const sigset_t, noalias oset: ?&sigset_t) c_int;
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pub extern "c" fn sigaction(sig: c_int, noalias act: &const Sigaction, noalias oact: ?&Sigaction) c_int;
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pub extern "c" fn nanosleep(rqtp: &const timespec, rmtp: ?×pec) c_int;
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pub extern "c" fn setreuid(ruid: c_uint, euid: c_uint) c_int;
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pub extern "c" fn setregid(rgid: c_uint, egid: c_uint) c_int;
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pub extern "c" fn aligned_alloc(alignment: usize, size: usize) ?&c_void;
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pub extern "c" fn malloc(usize) ?&c_void;
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pub extern "c" fn realloc(&c_void, usize) ?&c_void;
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pub extern "c" fn free(&c_void) void;
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pub extern "c" fn posix_memalign(memptr: &&c_void, alignment: usize, size: usize) c_int;
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