diff options
| -rw-r--r-- | commit-slab.h | 34 | ||||
| -rw-r--r-- | commit.c | 28 |
2 files changed, 49 insertions, 13 deletions
diff --git a/commit-slab.h b/commit-slab.h index f37ec3831f..f84b449413 100644 --- a/commit-slab.h +++ b/commit-slab.h @@ -15,7 +15,13 @@ * - int *indegree_at(struct indegree *, struct commit *); * * This function locates the data associated with the given commit in - * the indegree slab, and returns the pointer to it. + * the indegree slab, and returns the pointer to it. The location to + * store the data is allocated as necessary. + * + * - int *indegree_peek(struct indegree *, struct commit *); + * + * This function is similar to indegree_at(), but it will return NULL + * until a call to indegree_at() was made for the commit. * * - void init_indegree(struct indegree *); * void init_indegree_with_stride(struct indegree *, int); @@ -80,8 +86,9 @@ static MAYBE_UNUSED void clear_ ##slabname(struct slabname *s) \ s->slab = NULL; \ } \ \ -static MAYBE_UNUSED elemtype *slabname## _at(struct slabname *s, \ - const struct commit *c) \ +static MAYBE_UNUSED elemtype *slabname## _at_peek(struct slabname *s, \ + const struct commit *c, \ + int add_if_missing) \ { \ int nth_slab, nth_slot; \ \ @@ -90,16 +97,33 @@ static MAYBE_UNUSED elemtype *slabname## _at(struct slabname *s, \ \ if (s->slab_count <= nth_slab) { \ int i; \ + if (!add_if_missing) \ + return NULL; \ REALLOC_ARRAY(s->slab, nth_slab + 1); \ stat_ ##slabname## realloc++; \ for (i = s->slab_count; i <= nth_slab; i++) \ s->slab[i] = NULL; \ s->slab_count = nth_slab + 1; \ } \ - if (!s->slab[nth_slab]) \ + if (!s->slab[nth_slab]) { \ + if (!add_if_missing) \ + return NULL; \ s->slab[nth_slab] = xcalloc(s->slab_size, \ sizeof(**s->slab) * s->stride); \ - return &s->slab[nth_slab][nth_slot * s->stride]; \ + } \ + return &s->slab[nth_slab][nth_slot * s->stride]; \ +} \ + \ +static MAYBE_UNUSED elemtype *slabname## _at(struct slabname *s, \ + const struct commit *c) \ +{ \ + return slabname##_at_peek(s, c, 1); \ +} \ + \ +static MAYBE_UNUSED elemtype *slabname## _peek(struct slabname *s, \ + const struct commit *c) \ +{ \ + return slabname##_at_peek(s, c, 0); \ } \ \ static int stat_ ##slabname## realloc @@ -245,7 +245,12 @@ void set_commit_buffer(struct commit *commit, void *buffer, unsigned long size) const void *get_cached_commit_buffer(const struct commit *commit, unsigned long *sizep) { - struct commit_buffer *v = buffer_slab_at(&buffer_slab, commit); + struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); + if (!v) { + if (sizep) + *sizep = 0; + return NULL; + } if (sizep) *sizep = v->size; return v->buffer; @@ -272,24 +277,31 @@ const void *get_commit_buffer(const struct commit *commit, unsigned long *sizep) void unuse_commit_buffer(const struct commit *commit, const void *buffer) { - struct commit_buffer *v = buffer_slab_at(&buffer_slab, commit); - if (v->buffer != buffer) + struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); + if (!(v && v->buffer == buffer)) free((void *)buffer); } void free_commit_buffer(struct commit *commit) { - struct commit_buffer *v = buffer_slab_at(&buffer_slab, commit); - free(v->buffer); - v->buffer = NULL; - v->size = 0; + struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); + if (v) { + free(v->buffer); + v->buffer = NULL; + v->size = 0; + } } const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep) { - struct commit_buffer *v = buffer_slab_at(&buffer_slab, commit); + struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); void *ret; + if (!v) { + if (sizep) + *sizep = 0; + return NULL; + } ret = v->buffer; if (sizep) *sizep = v->size; |