mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-05 11:11:04 +00:00
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/* Allocate a new stack. Mach version.
|
|
Copyright (C) 2000-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
|
|
#include <mach.h>
|
|
#include <mach/machine/vm_param.h>
|
|
|
|
#include <pt-internal.h>
|
|
|
|
/* The next address to use for stack allocation. */
|
|
static vm_address_t next_stack_base = VM_MIN_ADDRESS;
|
|
|
|
|
|
/* Allocate a new stack of size STACKSIZE. If successful, store the
|
|
address of the newly allocated stack in *STACKADDR and return 0.
|
|
Otherwise return an error code (EINVAL for an invalid stack size,
|
|
EAGAIN if the system lacked the necessary resources to allocate a
|
|
new stack). */
|
|
int
|
|
__pthread_stack_alloc (void **stackaddr, size_t stacksize)
|
|
{
|
|
vm_offset_t base;
|
|
int i = 0;
|
|
|
|
get_stack:
|
|
i++;
|
|
for (base = next_stack_base;
|
|
base < VM_MAX_ADDRESS
|
|
&& __vm_allocate (__mach_task_self (), &base,
|
|
stacksize, FALSE) != KERN_SUCCESS; base += stacksize)
|
|
;
|
|
|
|
if (base >= VM_MAX_ADDRESS)
|
|
{
|
|
if (i == 1)
|
|
{
|
|
next_stack_base = VM_MIN_ADDRESS;
|
|
goto get_stack;
|
|
}
|
|
else
|
|
return EAGAIN;
|
|
}
|
|
|
|
if (base >= VM_MAX_ADDRESS)
|
|
return EAGAIN;
|
|
|
|
next_stack_base = base + stacksize;
|
|
|
|
(*stackaddr) = (void *) base;
|
|
return 0;
|
|
}
|