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Page allocator: indentation of messy ifdef blocks

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Maria Matejka 2023-05-03 21:39:36 +02:00
parent fa973c2c15
commit fac6405669
1 changed files with 50 additions and 50 deletions
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100
sysdep/unix/alloc.c
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@ -17,79 +17,79 @@
#include <unistd.h> #include <unistd.h>
#ifdef HAVE_MMAP #ifdef HAVE_MMAP
#include <sys/mman.h> # include <sys/mman.h>
#endif #endif
#ifdef CONFIG_DISABLE_THP #ifdef CONFIG_DISABLE_THP
#include <sys/prctl.h> # include <sys/prctl.h>
#ifndef PR_SET_THP_DISABLE # ifndef PR_SET_THP_DISABLE
#define PR_SET_THP_DISABLE 41 # define PR_SET_THP_DISABLE 41
#endif # endif
#endif #endif
long page_size = 0; long page_size = 0;
#ifdef HAVE_MMAP #ifdef HAVE_MMAP
#define KEEP_PAGES_MAX 512 # define KEEP_PAGES_MAX 512
#define KEEP_PAGES_MIN 32 # define KEEP_PAGES_MIN 32
#define KEEP_PAGES_MAX_LOCAL 16 # define KEEP_PAGES_MAX_LOCAL 16
#define ALLOC_PAGES_AT_ONCE 8 # define ALLOC_PAGES_AT_ONCE 8
STATIC_ASSERT(KEEP_PAGES_MIN * 4 < KEEP_PAGES_MAX); STATIC_ASSERT(KEEP_PAGES_MIN * 4 < KEEP_PAGES_MAX);
STATIC_ASSERT(ALLOC_PAGES_AT_ONCE < KEEP_PAGES_MAX_LOCAL); STATIC_ASSERT(ALLOC_PAGES_AT_ONCE < KEEP_PAGES_MAX_LOCAL);
static _Bool use_fake = 0; static _Bool use_fake = 0;
static _Bool initialized = 0; static _Bool initialized = 0;
#if DEBUGGING # if DEBUGGING
struct free_page { struct free_page {
node unused[42]; node unused[42];
struct free_page * _Atomic next; struct free_page * _Atomic next;
}; };
#else # else
struct free_page { struct free_page {
struct free_page * _Atomic next; struct free_page * _Atomic next;
}; };
#endif # endif
#define EP_POS_MAX ((page_size - OFFSETOF(struct empty_pages, pages)) / sizeof (void *)) # define EP_POS_MAX ((page_size - OFFSETOF(struct empty_pages, pages)) / sizeof (void *))
struct empty_pages { struct empty_pages {
struct empty_pages *next; struct empty_pages *next;
uint pos; uint pos;
void *pages[0]; void *pages[0];
}; };
DEFINE_DOMAIN(resource); DEFINE_DOMAIN(resource);
static DOMAIN(resource) empty_pages_domain; static DOMAIN(resource) empty_pages_domain;
static struct empty_pages *empty_pages = NULL; static struct empty_pages *empty_pages = NULL;
static struct free_page * _Atomic page_stack = NULL; static struct free_page * _Atomic page_stack = NULL;
static _Thread_local struct free_page * local_page_stack = NULL; static _Thread_local struct free_page * local_page_stack = NULL;
static void page_cleanup(void *); static void page_cleanup(void *);
static event page_cleanup_event = { .hook = page_cleanup, }; static event page_cleanup_event = { .hook = page_cleanup, };
#define SCHEDULE_CLEANUP do if (initialized && !shutting_down) ev_send(&global_event_list, &page_cleanup_event); while (0) # define SCHEDULE_CLEANUP do if (initialized && !shutting_down) ev_send(&global_event_list, &page_cleanup_event); while (0)
_Atomic int pages_kept = 0; _Atomic int pages_kept = 0;
_Atomic int pages_kept_locally = 0; _Atomic int pages_kept_locally = 0;
static _Thread_local int pages_kept_here = 0; static _Thread_local int pages_kept_here = 0;
static void * static void *
alloc_sys_page(void) alloc_sys_page(void)
{ {
void *ptr = mmap(NULL, page_size * ALLOC_PAGES_AT_ONCE, PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); void *ptr = mmap(NULL, page_size * ALLOC_PAGES_AT_ONCE, PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (ptr == MAP_FAILED) if (ptr == MAP_FAILED)
die("mmap(%ld) failed: %m", (s64) page_size); die("mmap(%ld) failed: %m", (s64) page_size);
return ptr; return ptr;
} }
extern int shutting_down; /* Shutdown requested. */ extern int shutting_down; /* Shutdown requested. */
#else // ! HAVE_MMAP #else // ! HAVE_MMAP
#define use_fake 1 # define use_fake 1
#endif #endif
void * void *