diff options
Diffstat (limited to 'upb/upb.c')
| -rw-r--r-- | upb/upb.c | 181 |
1 files changed, 55 insertions, 126 deletions
@@ -8,12 +8,6 @@ #include <string.h> #include "upb/upb.h" -bool upb_dumptostderr(void *closure, const upb_status* status) { - UPB_UNUSED(closure); - fprintf(stderr, "%s\n", upb_status_errmsg(status)); - return false; -} - /* Guarantee null-termination and provide ellipsis truncation. * It may be tempting to "optimize" this by initializing these final * four bytes up-front and then being careful never to overwrite them, @@ -25,39 +19,21 @@ static void nullz(upb_status *status) { memcpy(status->msg + sizeof(status->msg) - len, ellipsis, len); } - -/* upb_upberr *****************************************************************/ - -upb_errorspace upb_upberr = {"upb error"}; - -void upb_upberr_setoom(upb_status *status) { - status->error_space_ = &upb_upberr; - upb_status_seterrmsg(status, "Out of memory"); -} - - /* upb_status *****************************************************************/ void upb_status_clear(upb_status *status) { if (!status) return; - status->ok_ = true; - status->code_ = 0; + status->ok = true; status->msg[0] = '\0'; } -bool upb_ok(const upb_status *status) { return status->ok_; } - -upb_errorspace *upb_status_errspace(const upb_status *status) { - return status->error_space_; -} - -int upb_status_errcode(const upb_status *status) { return status->code_; } +bool upb_ok(const upb_status *status) { return status->ok; } const char *upb_status_errmsg(const upb_status *status) { return status->msg; } void upb_status_seterrmsg(upb_status *status, const char *msg) { if (!status) return; - status->ok_ = false; + status->ok = false; strncpy(status->msg, msg, sizeof(status->msg)); nullz(status); } @@ -71,17 +47,11 @@ void upb_status_seterrf(upb_status *status, const char *fmt, ...) { void upb_status_vseterrf(upb_status *status, const char *fmt, va_list args) { if (!status) return; - status->ok_ = false; + status->ok = false; _upb_vsnprintf(status->msg, sizeof(status->msg), fmt, args); nullz(status); } -void upb_status_copy(upb_status *to, const upb_status *from) { - if (!to) return; - *to = *from; -} - - /* upb_alloc ******************************************************************/ static void *upb_global_allocfunc(upb_alloc *alloc, void *ptr, size_t oldsize, @@ -98,7 +68,6 @@ static void *upb_global_allocfunc(upb_alloc *alloc, void *ptr, size_t oldsize, upb_alloc upb_alloc_global = {&upb_global_allocfunc}; - /* upb_arena ******************************************************************/ /* Be conservative and choose 16 in case anyone is using SSE. */ @@ -108,6 +77,26 @@ static size_t align_up_max(size_t size) { return ((size + maxalign - 1) / maxalign) * maxalign; } +struct upb_arena { + /* We implement the allocator interface. + * This must be the first member of upb_arena! */ + upb_alloc alloc; + + /* Allocator to allocate arena blocks. We are responsible for freeing these + * when we are destroyed. */ + upb_alloc *block_alloc; + + size_t bytes_allocated; + size_t next_block_size; + size_t max_block_size; + + /* Linked list of blocks. Points to an arena_block, defined in env.c */ + void *block_head; + + /* Cleanup entries. Pointer to a cleanup_ent, defined in env.c */ + void *cleanup_head; +}; + typedef struct mem_block { struct mem_block *next; size_t size; @@ -136,7 +125,6 @@ static void upb_arena_addblock(upb_arena *a, void *ptr, size_t size, /* TODO(haberman): ASAN poison. */ } - static mem_block *upb_arena_allocblock(upb_arena *a, size_t size) { size_t block_size = UPB_MAX(size, a->next_block_size) + sizeof(mem_block); mem_block *block = upb_malloc(a->block_alloc, block_size); @@ -189,7 +177,29 @@ static void *upb_arena_doalloc(upb_alloc *alloc, void *ptr, size_t oldsize, /* Public Arena API ***********************************************************/ -void upb_arena_init(upb_arena *a) { +#define upb_alignof(type) offsetof (struct { char c; type member; }, member) + +upb_arena *upb_arena_init(void *mem, size_t n, upb_alloc *alloc) { + const size_t first_block_overhead = sizeof(upb_arena) + sizeof(mem_block); + upb_arena *a; + bool owned = false; + + /* Round block size down to alignof(*a) since we will allocate the arena + * itself at the end. */ + n &= ~(upb_alignof(upb_arena) - 1); + + if (n < first_block_overhead) { + /* We need to malloc the initial block. */ + n = first_block_overhead + 256; + owned = true; + if (!alloc || !(mem = upb_malloc(alloc, n))) { + return NULL; + } + } + + a = (void*)((char*)mem + n - sizeof(*a)); + n -= sizeof(*a); + a->alloc.func = &upb_arena_doalloc; a->block_alloc = &upb_alloc_global; a->bytes_allocated = 0; @@ -197,21 +207,16 @@ void upb_arena_init(upb_arena *a) { a->max_block_size = 16384; a->cleanup_head = NULL; a->block_head = NULL; -} - -void upb_arena_init2(upb_arena *a, void *mem, size_t size, upb_alloc *alloc) { - upb_arena_init(a); + a->block_alloc = alloc; - if (size > sizeof(mem_block)) { - upb_arena_addblock(a, mem, size, false); - } + upb_arena_addblock(a, mem, n, owned); - if (alloc) { - a->block_alloc = alloc; - } + return a; } -void upb_arena_uninit(upb_arena *a) { +#undef upb_alignof + +void upb_arena_free(upb_arena *a) { cleanup_ent *ent = a->cleanup_head; mem_block *block = a->block_head; @@ -223,6 +228,7 @@ void upb_arena_uninit(upb_arena *a) { /* Must do this after running cleanup functions, because this will delete * the memory we store our cleanup entries in! */ while (block) { + /* Load first since we are deleting block. */ mem_block *next = block->next; if (block->owned) { @@ -231,13 +237,9 @@ void upb_arena_uninit(upb_arena *a) { block = next; } - - /* Protect against multiple-uninit. */ - a->cleanup_head = NULL; - a->block_head = NULL; } -bool upb_arena_addcleanup(upb_arena *a, upb_cleanup_func *func, void *ud) { +bool upb_arena_addcleanup(upb_arena *a, void *ud, upb_cleanup_func *func) { cleanup_ent *ent = upb_malloc(&a->alloc, sizeof(cleanup_ent)); if (!ent) { return false; /* Out of memory. */ @@ -254,76 +256,3 @@ bool upb_arena_addcleanup(upb_arena *a, upb_cleanup_func *func, void *ud) { size_t upb_arena_bytesallocated(const upb_arena *a) { return a->bytes_allocated; } - - -/* Standard error functions ***************************************************/ - -static bool default_err(void *ud, const upb_status *status) { - UPB_UNUSED(ud); - UPB_UNUSED(status); - return false; -} - -static bool write_err_to(void *ud, const upb_status *status) { - upb_status *copy_to = ud; - upb_status_copy(copy_to, status); - return false; -} - - -/* upb_env ********************************************************************/ - -void upb_env_initonly(upb_env *e) { - e->ok_ = true; - e->error_func_ = &default_err; - e->error_ud_ = NULL; -} - -void upb_env_init(upb_env *e) { - upb_arena_init(&e->arena_); - upb_env_initonly(e); -} - -void upb_env_init2(upb_env *e, void *mem, size_t n, upb_alloc *alloc) { - upb_arena_init2(&e->arena_, mem, n, alloc); - upb_env_initonly(e); -} - -void upb_env_uninit(upb_env *e) { - upb_arena_uninit(&e->arena_); -} - -void upb_env_seterrorfunc(upb_env *e, upb_error_func *func, void *ud) { - e->error_func_ = func; - e->error_ud_ = ud; -} - -void upb_env_reporterrorsto(upb_env *e, upb_status *s) { - e->error_func_ = &write_err_to; - e->error_ud_ = s; -} - -bool upb_env_reporterror(upb_env *e, const upb_status *status) { - e->ok_ = false; - return e->error_func_(e->error_ud_, status); -} - -void *upb_env_malloc(upb_env *e, size_t size) { - return upb_malloc(&e->arena_.alloc, size); -} - -void *upb_env_realloc(upb_env *e, void *ptr, size_t oldsize, size_t size) { - return upb_realloc(&e->arena_.alloc, ptr, oldsize, size); -} - -void upb_env_free(upb_env *e, void *ptr) { - upb_free(&e->arena_.alloc, ptr); -} - -bool upb_env_addcleanup(upb_env *e, upb_cleanup_func *func, void *ud) { - return upb_arena_addcleanup(&e->arena_, func, ud); -} - -size_t upb_env_bytesallocated(const upb_env *e) { - return upb_arena_bytesallocated(&e->arena_); -} |