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runtime: add freebsd free_memory() support #23594

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merged 3 commits into from
Jan 29, 2025
Merged

runtime: add freebsd free_memory() support #23594

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e6c2729
runtime: add freebsd free_memory() support
kbkpbot Jan 26, 2025
5db0123
use C.sysctlnametomib
kbkpbot Jan 29, 2025
de6e7c2
fix
kbkpbot Jan 29, 2025
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1 change: 1 addition & 0 deletions vlib/builtin/cfns.c.v
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Original file line number Diff line number Diff line change
Expand Up @@ -232,6 +232,7 @@ fn C.isatty(fd int) int
fn C.syscall(number int, va ...voidptr) int

fn C.sysctl(name &int, namelen u32, oldp voidptr, oldlenp voidptr, newp voidptr, newlen usize) int
fn C.sysctlnametomib(name charptr, mib &int, len &usize) int
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@[trusted]
fn C._fileno(int) int
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9 changes: 4 additions & 5 deletions vlib/runtime/free_memory_impl_freebsd.c.v
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Expand Up @@ -7,13 +7,12 @@ fn free_memory_impl() usize {
$if !cross ? {
$if freebsd {
page_size := usize(C.sysconf(C._SC_PAGESIZE))
// sysctlnametomib("vm.stats.vm.v_free_count") => mib :
mib := [C.CTL_VM, 2147481600, 2147481598, 2147481557]!
mut mib := [4]int{}
mut len := usize(4)
unsafe { C.sysctlnametomib(c'vm.stats.vm.v_free_count', &mib[0], &len) }
mut free_pages := int(0)
bufsize := usize(4)
unsafe {
C.sysctl(&mib[0], mib.len, &free_pages, &bufsize, 0, 0)
}
unsafe { C.sysctl(&mib[0], mib.len, &free_pages, &bufsize, 0, 0) }
return page_size * usize(free_pages)
}
}
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