53433cdea2
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.
77 lines
3.0 KiB
Zig
77 lines
3.0 KiB
Zig
// SPDX-License-Identifier: MIT
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// Copyright (c) 2015-2020 Zig Contributors
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// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
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// The MIT license requires this copyright notice to be included in all copies
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// and substantial portions of the software.
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const std = @import("../std.zig");
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const builtin = std.builtin;
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usingnamespace std.c;
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extern "c" fn __errno() *c_int;
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pub const _errno = __errno;
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pub const dl_iterate_phdr_callback = fn (info: *dl_phdr_info, size: usize, data: ?*c_void) callconv(.C) c_int;
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pub extern "c" fn dl_iterate_phdr(callback: dl_iterate_phdr_callback, data: ?*c_void) c_int;
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pub extern "c" fn arc4random_buf(buf: [*]u8, len: usize) void;
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pub extern "c" fn __fstat50(fd: fd_t, buf: *Stat) c_int;
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pub extern "c" fn __stat50(path: [*:0]const u8, buf: *Stat) c_int;
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pub extern "c" fn __clock_gettime50(clk_id: c_int, tp: *timespec) c_int;
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pub extern "c" fn __clock_getres50(clk_id: c_int, tp: *timespec) c_int;
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pub extern "c" fn __getdents30(fd: c_int, buf_ptr: [*]u8, nbytes: usize) c_int;
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pub extern "c" fn __sigaltstack14(ss: ?*stack_t, old_ss: ?*stack_t) c_int;
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pub extern "c" fn __nanosleep50(rqtp: *const timespec, rmtp: ?*timespec) c_int;
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pub extern "c" fn __sigaction14(sig: c_int, noalias act: *const Sigaction, noalias oact: ?*Sigaction) c_int;
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pub extern "c" fn __sigprocmask14(how: c_int, noalias set: ?*const sigset_t, noalias oset: ?*sigset_t) c_int;
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pub extern "c" fn __socket30(domain: c_uint, sock_type: c_uint, protocol: c_uint) c_int;
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pub extern "c" fn __gettimeofday50(noalias tv: ?*timeval, noalias tz: ?*timezone) c_int;
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pub extern "c" fn __getrusage50(who: c_int, usage: *rusage) c_int;
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// libc aliases this as sched_yield
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pub extern "c" fn __libc_thr_yield() c_int;
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pub extern "c" fn posix_memalign(memptr: *?*c_void, alignment: usize, size: usize) c_int;
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pub extern "c" fn malloc_usable_size(?*const c_void) usize;
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pub const pthread_mutex_t = extern struct {
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ptm_magic: u32 = 0x33330003,
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ptm_errorcheck: padded_pthread_spin_t = 0,
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ptm_ceiling: padded_pthread_spin_t = 0,
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ptm_owner: usize = 0,
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ptm_waiters: ?*u8 = null,
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ptm_recursed: u32 = 0,
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ptm_spare2: ?*c_void = null,
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};
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pub const pthread_cond_t = extern struct {
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ptc_magic: u32 = 0x55550005,
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ptc_lock: pthread_spin_t = 0,
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ptc_waiters_first: ?*u8 = null,
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ptc_waiters_last: ?*u8 = null,
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ptc_mutex: ?*pthread_mutex_t = null,
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ptc_private: ?*c_void = null,
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};
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const pthread_spin_t = switch (builtin.arch) {
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.aarch64, .aarch64_be, .aarch64_32 => u8,
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.mips, .mipsel, .mips64, .mips64el => u32,
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.powerpc, .powerpc64, .powerpc64le => i32,
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.i386, .x86_64 => u8,
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.arm, .armeb, .thumb, .thumbeb => i32,
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.sparc, .sparcel, .sparcv9 => u8,
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.riscv32, .riscv64 => u32,
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else => @compileError("undefined pthread_spin_t for this arch"),
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};
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const padded_pthread_spin_t = switch (builtin.arch) {
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.i386, .x86_64 => u32,
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.sparc, .sparcel, .sparcv9 => u32,
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else => pthread_spin_t,
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};
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pub const pthread_attr_t = extern struct {
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pta_magic: u32,
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pta_flags: i32,
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pta_private: ?*c_void,
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};
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