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-rw-r--r--src/journal/journal-file.c1
-rw-r--r--src/journal/mmap-cache.c34
-rw-r--r--src/journal/mmap-cache.h2
3 files changed, 17 insertions, 20 deletions
diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
index 82e50fcca4..7cdaf2920b 100644
--- a/src/journal/journal-file.c
+++ b/src/journal/journal-file.c
@@ -376,6 +376,7 @@ static int journal_file_allocate(JournalFile *f, uint64_t offset, uint64_t size)
static unsigned type_to_context(ObjectType type) {
/* One context for each type, plus one catch-all for the rest */
+ assert_cc(_OBJECT_TYPE_MAX <= MMAP_CACHE_MAX_CONTEXTS);
return type > OBJECT_UNUSED && type < _OBJECT_TYPE_MAX ? type : 0;
}
diff --git a/src/journal/mmap-cache.c b/src/journal/mmap-cache.c
index 949f97819b..4c940aaa24 100644
--- a/src/journal/mmap-cache.c
+++ b/src/journal/mmap-cache.c
@@ -76,7 +76,7 @@ struct MMapCache {
Hashmap *fds;
- Hashmap *contexts;
+ Context *contexts[MMAP_CACHE_MAX_CONTEXTS];
LIST_HEAD(Window, unused);
Window *last_unused;
@@ -231,18 +231,13 @@ static void context_attach_window(Context *c, Window *w) {
static Context *context_add(MMapCache *m, unsigned id) {
Context *c;
- int r;
assert(m);
- c = hashmap_get(m->contexts, UINT_TO_PTR(id + 1));
+ c = m->contexts[id];
if (c)
return c;
- r = hashmap_ensure_allocated(&m->contexts, NULL);
- if (r < 0)
- return NULL;
-
c = new0(Context, 1);
if (!c)
return NULL;
@@ -250,11 +245,8 @@ static Context *context_add(MMapCache *m, unsigned id) {
c->cache = m;
c->id = id;
- r = hashmap_put(m->contexts, UINT_TO_PTR(id + 1), c);
- if (r < 0) {
- free(c);
- return NULL;
- }
+ assert(!m->contexts[id]);
+ m->contexts[id] = c;
return c;
}
@@ -264,8 +256,10 @@ static void context_free(Context *c) {
context_detach_window(c);
- if (c->cache)
- assert_se(hashmap_remove(c->cache->contexts, UINT_TO_PTR(c->id + 1)));
+ if (c->cache) {
+ assert(c->cache->contexts[c->id] == c);
+ c->cache->contexts[c->id] = NULL;
+ }
free(c);
}
@@ -314,15 +308,14 @@ static FileDescriptor* fd_add(MMapCache *m, int fd) {
}
static void mmap_cache_free(MMapCache *m) {
- Context *c;
FileDescriptor *f;
+ int i;
assert(m);
- while ((c = hashmap_first(m->contexts)))
- context_free(c);
-
- hashmap_free(m->contexts);
+ for (i = 0; i < MMAP_CACHE_MAX_CONTEXTS; i++)
+ if (m->contexts[i])
+ context_free(m->contexts[i]);
while ((f = hashmap_first(m->fds)))
fd_free(f);
@@ -374,7 +367,7 @@ static int try_context(
assert(size > 0);
assert(ret);
- c = hashmap_get(m->contexts, UINT_TO_PTR(context+1));
+ c = m->contexts[context];
if (!c)
return 0;
@@ -557,6 +550,7 @@ int mmap_cache_get(
assert(fd >= 0);
assert(size > 0);
assert(ret);
+ assert(context < MMAP_CACHE_MAX_CONTEXTS);
/* Check whether the current context is the right one already */
r = try_context(m, fd, prot, context, keep_always, offset, size, ret);
diff --git a/src/journal/mmap-cache.h b/src/journal/mmap-cache.h
index 543a2bf2d0..fe2c83d751 100644
--- a/src/journal/mmap-cache.h
+++ b/src/journal/mmap-cache.h
@@ -25,6 +25,8 @@
#include <stdbool.h>
#include <sys/stat.h>
+#define MMAP_CACHE_MAX_CONTEXTS 8
+
typedef struct MMapCache MMapCache;
MMapCache* mmap_cache_new(void);