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Add multithreading helpers

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Add an abstraction for mutexts and threads
that handles both pthread api and native win32 api

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
This commit is contained in:
Ronnie Sahlberg
2025-03-07 08:23:32 +10:00
parent f8542ab5cc
commit cb44ad4e26
6 changed files with 471 additions and 0 deletions
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46
include/iscsi-private.h
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@@ -28,6 +28,39 @@
#include "iscsi.h"
#ifdef HAVE_MULTITHREADING
#ifdef HAVE_STDATOMIC_H
#include <stdatomic.h>
#define ATOMIC_INC(rpc, x) \
atomic_fetch_add_explicit(&x, 1, memory_order_relaxed)
#define ATOMIC_DEC(rpc, x) \
atomic_fetch_sub_explicit(&x, 1, memory_order_relaxed)
#else /* HAVE_STDATOMIC_H */
#define ATOMIC_INC(rpc, x) \
if (rpc->multithreading_enabled) { \
nfs_mt_mutex_lock(&rpc->atomic_int_mutex); \
} \
x++; \
if (rpc->multithreading_enabled) { \
nfs_mt_mutex_unlock(&rpc->atomic_int_mutex); \
}
#define ATOMIC_DEC(rpc, x) \
if (rpc->multithreading_enabled) { \
nfs_mt_mutex_lock(&rpc->atomic_int_mutex); \
} \
x--; \
if (rpc->multithreading_enabled) { \
nfs_mt_mutex_unlock(&rpc->atomic_int_mutex); \
}
#endif /* HAVE_STDATOMIC_H */
#else /* HAVE_MULTITHREADING */
/* no multithreading support, no need to protect the increment */
#define ATOMIC_INC(rpc, x) x++
#define ATOMIC_DEC(rpc, x) x--
#endif /* HAVE_MULTITHREADING */
#include "iscsi-multithreading.h"
#ifdef __cplusplus
extern "C" {
#endif
@@ -184,6 +217,19 @@ struct iscsi_context {
int no_ua_on_reconnect;
void (*fd_dup_cb)(struct iscsi_context *iscsi, void *opaque);
void *fd_dup_opaque;
#ifdef HAVE_MULTITHREADING
int multithreading_enabled;
libiscsi_mutex_t iscsi_mutex;
libiscsi_thread_t service_thread;
int poll_timeout;
//libnfs_mutex_t nfs4_open_counter_mutex;
//libnfs_mutex_t nfs4_open_call_mutex;
//struct nfs_thread_context *thread_ctx;
#ifndef HAVE_STDATOMIC_H
libiscsi_mutex_t atomic_int_mutex;
#endif /* HAVE_STDATOMIC_H */
#endif /* HAVE_MULTITHREADING */
};
#define ISCSI_PDU_IMMEDIATE 0x40