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Implementing the ability to cancel request before worker starts processing it.

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This commit is contained in:
Max Romanov
2017-12-27 17:46:17 +03:00
parent 45d08d5145
commit 89c0f7c5db
14 changed files with 549 additions and 364 deletions
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46
src/nxt_port_memory_int.h
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@@ -52,6 +52,10 @@ struct nxt_port_mmap_header_s {
nxt_pid_t dst_pid; /* For sanity check. */
nxt_port_id_t sent_over;
nxt_free_map_t free_map[MAX_FREE_IDX];
nxt_free_map_t free_map_padding;
nxt_free_map_t free_tracking_map[MAX_FREE_IDX];
nxt_free_map_t free_tracking_map_padding;
nxt_atomic_t tracking[PORT_MMAP_CHUNK_COUNT];
};
@@ -78,20 +82,27 @@ struct nxt_port_mmap_msg_s {
};
static nxt_bool_t
nxt_port_mmap_get_free_chunk(nxt_port_mmap_header_t *hdr, nxt_chunk_id_t *c);
typedef struct nxt_port_mmap_tracking_msg_s nxt_port_mmap_tracking_msg_t;
#define nxt_port_mmap_get_chunk_busy(hdr, c) \
((hdr->free_map[FREE_IDX(c)] & FREE_MASK(c)) == 0)
struct nxt_port_mmap_tracking_msg_s {
uint32_t mmap_id; /* Mmap index in nxt_process_t.outgoing. */
nxt_chunk_id_t tracking_id; /* Tracking index. */
};
static nxt_bool_t
nxt_port_mmap_get_free_chunk(nxt_free_map_t *m, nxt_chunk_id_t *c);
#define nxt_port_mmap_get_chunk_busy(m, c) \
((m[FREE_IDX(c)] & FREE_MASK(c)) == 0)
nxt_inline void
nxt_port_mmap_set_chunk_busy(nxt_port_mmap_header_t *hdr, nxt_chunk_id_t c);
nxt_port_mmap_set_chunk_busy(nxt_free_map_t *m, nxt_chunk_id_t c);
nxt_inline nxt_bool_t
nxt_port_mmap_chk_set_chunk_busy(nxt_port_mmap_header_t *hdr, nxt_chunk_id_t c);
nxt_port_mmap_chk_set_chunk_busy(nxt_free_map_t *m, nxt_chunk_id_t c);
nxt_inline void
nxt_port_mmap_set_chunk_free(nxt_port_mmap_header_t *hdr, nxt_chunk_id_t c);
nxt_port_mmap_set_chunk_free(nxt_free_map_t *m, nxt_chunk_id_t c);
nxt_inline nxt_chunk_id_t
nxt_port_mmap_chunk_id(nxt_port_mmap_header_t *hdr, u_char *p)
@@ -116,18 +127,15 @@ nxt_port_mmap_chunk_start(nxt_port_mmap_header_t *hdr, nxt_chunk_id_t c)
static nxt_bool_t
nxt_port_mmap_get_free_chunk(nxt_port_mmap_header_t *hdr, nxt_chunk_id_t *c)
nxt_port_mmap_get_free_chunk(nxt_free_map_t *m, nxt_chunk_id_t *c)
{
int ffs;
size_t i;
nxt_chunk_id_t chunk;
nxt_free_map_t bits;
nxt_free_map_t *free_map;
free_map = hdr->free_map;
for (i = 0; i < MAX_FREE_IDX; i++) {
bits = free_map[i];
bits = m[i];
if (bits == 0) {
continue;
}
@@ -136,7 +144,7 @@ nxt_port_mmap_get_free_chunk(nxt_port_mmap_header_t *hdr, nxt_chunk_id_t *c)
if (ffs != 0) {
chunk = i * FREE_BITS + ffs - 1;
if (nxt_port_mmap_chk_set_chunk_busy(hdr, chunk)) {
if (nxt_port_mmap_chk_set_chunk_busy(m, chunk)) {
*c = chunk;
return 1;
}
@@ -148,19 +156,19 @@ nxt_port_mmap_get_free_chunk(nxt_port_mmap_header_t *hdr, nxt_chunk_id_t *c)
nxt_inline void
nxt_port_mmap_set_chunk_busy(nxt_port_mmap_header_t *hdr, nxt_chunk_id_t c)
nxt_port_mmap_set_chunk_busy(nxt_free_map_t *m, nxt_chunk_id_t c)
{
nxt_atomic_and_fetch(hdr->free_map + FREE_IDX(c), ~FREE_MASK(c));
nxt_atomic_and_fetch(m + FREE_IDX(c), ~FREE_MASK(c));
}
nxt_inline nxt_bool_t
nxt_port_mmap_chk_set_chunk_busy(nxt_port_mmap_header_t *hdr, nxt_chunk_id_t c)
nxt_port_mmap_chk_set_chunk_busy(nxt_free_map_t *m, nxt_chunk_id_t c)
{
nxt_free_map_t *f;
nxt_free_map_t free_val, busy_val;
f = hdr->free_map + FREE_IDX(c);
f = m + FREE_IDX(c);
while ( (*f & FREE_MASK(c)) != 0 ) {
@@ -177,9 +185,9 @@ nxt_port_mmap_chk_set_chunk_busy(nxt_port_mmap_header_t *hdr, nxt_chunk_id_t c)
nxt_inline void
nxt_port_mmap_set_chunk_free(nxt_port_mmap_header_t *hdr, nxt_chunk_id_t c)
nxt_port_mmap_set_chunk_free(nxt_free_map_t *m, nxt_chunk_id_t c)
{
nxt_atomic_or_fetch(hdr->free_map + FREE_IDX(c), FREE_MASK(c));
nxt_atomic_or_fetch(m + FREE_IDX(c), FREE_MASK(c));
}