diff options
Diffstat (limited to 'libpipe/pq.h')
| -rw-r--r-- | libpipe/pq.h | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/libpipe/pq.h b/libpipe/pq.h index 2f8311ef..0fffe254 100644 --- a/libpipe/pq.h +++ b/libpipe/pq.h @@ -25,9 +25,12 @@ #include <stddef.h> /* for size_t */ #include <string.h> #include <mach/mach.h> +#include <features.h> -#ifndef PQ_EI -#define PQ_EI extern inline +#ifdef PQ_DEFINE_EI +#define PQ_EI +#else +#define PQ_EI __extern_inline #endif @@ -70,6 +73,10 @@ error_t packet_set_ports (struct packet *packet, /* If PACKET has any ports, deallocates them. */ void packet_dealloc_ports (struct packet *packet); +extern size_t packet_readable (struct packet *packet); + +#if defined(__USE_EXTERN_INLINES) || defined(PQ_DEFINE_EI) + /* Returns the number of bytes of data in PACKET. */ PQ_EI size_t packet_readable (struct packet *packet) @@ -77,6 +84,8 @@ packet_readable (struct packet *packet) return packet->buf_end - packet->buf_start; } +#endif /* Use extern inlines. */ + /* Append the bytes in DATA, of length DATA_LEN, to what's already in PACKET, and return the amount appended in AMOUNT if that's not the null pointer. */ error_t packet_write (struct packet *packet, @@ -94,6 +103,10 @@ error_t packet_read (struct packet *packet, error_t packet_read_ports (struct packet *packet, mach_port_t **ports, size_t *num_ports); +extern void packet_read_source (struct packet *packet, void **source); + +#if defined(__USE_EXTERN_INLINES) || defined(PQ_DEFINE_EI) + /* Return the source addressd in PACKET in SOURCE, deallocating it from PACKET. */ PQ_EI void @@ -102,6 +115,8 @@ packet_read_source (struct packet *packet, void **source) *source = packet->source; packet->source = 0; } + +#endif /* Use extern inlines. */ /* The packet size above which we start to do things differently to avoid copying around data. */ @@ -125,6 +140,14 @@ int packet_extend (struct packet *packet, size_t new_len); returned. */ error_t packet_realloc (struct packet *packet, size_t new_len); +extern int packet_fit (struct packet *packet, size_t amount); + +extern error_t packet_ensure (struct packet *packet, size_t amount); + +extern int packet_ensure_efficiently (struct packet *packet, size_t amount); + +#if defined(__USE_EXTERN_INLINES) || defined(PQ_DEFINE_EI) + /* Try to make space in PACKET for AMOUNT more bytes without growing the buffer, returning true if we could do it. */ PQ_EI int @@ -189,6 +212,8 @@ packet_ensure_efficiently (struct packet *packet, size_t amount) } return 0; } + +#endif /* Use extern inlines. */ struct pq { @@ -201,6 +226,10 @@ struct pq the packet, or deallocated by calling pipe_dealloc_addr. */ struct packet *pq_queue (struct pq *pq, unsigned type, void *source); +extern struct packet * pq_tail (struct pq *pq, unsigned type, void *source); + +#if defined(__USE_EXTERN_INLINES) || defined(PQ_DEFINE_EI) + /* Returns the tail of the packet queue PQ, which may mean pushing a new packet if TYPE and SOURCE do not match the current tail, or this is the first packet. */ @@ -214,10 +243,18 @@ pq_tail (struct pq *pq, unsigned type, void *source) return tail; } +#endif /* Use extern inlines. */ + /* Remove the first packet (if any) in PQ, deallocating any resources it holds. True is returned if a packet was found, false otherwise. */ int pq_dequeue (struct pq *pq); +extern struct packet * pq_head (struct pq *pq, unsigned type, void *source); + +extern struct packet * pq_next (struct pq *pq, unsigned type, void *source); + +#if defined(__USE_EXTERN_INLINES) || defined(PQ_DEFINE_EI) + /* Returns the next available packet in PQ, without removing it from the queue, or NULL if there is none, or the next packet isn't appropriate. A packet is inappropriate if SOURCE is non-NULL its source field doesn't @@ -246,6 +283,8 @@ pq_next (struct pq *pq, unsigned type, void *source) return pq_head (pq, type, source); } +#endif /* Use extern inlines. */ + /* Dequeues all packets in PQ. */ void pq_drain (struct pq *pq); |