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cygfuse: improve cygfuse initialization

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This commit is contained in:
Bill Zissimopoulos
2017-05-17 14:59:31 -07:00
parent 4ea9c6e362
commit 18a77d63c3
5 changed files with 25 additions and 6 deletions
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29
opt/cygfuse/cygfuse.c
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@ -22,18 +22,34 @@
#include <unistd.h>
#include <sys/cygwin.h>
static void *cygfuse_init_slow(int force);
static void *cygfuse_init_winfsp();
static void *cygfuse_init_fail();
static pthread_mutex_t cygfuse_mutex = PTHREAD_MUTEX_INITIALIZER;
static void *cygfuse_handle = 0;
static inline void cygfuse_init(int force)
static inline void *cygfuse_init_fast(void)
{
void *handle = cygfuse_handle;
__sync_synchronize(); /* memory barrier */
if (0 == handle)
handle = cygfuse_init_slow(0);
return handle;
}
static void *cygfuse_init_slow(int force)
{
void *handle;
pthread_mutex_lock(&cygfuse_mutex);
if (force || 0 == cygfuse_handle)
cygfuse_handle = cygfuse_init_winfsp();
handle = cygfuse_handle;
if (force || 0 == handle)
{
handle = cygfuse_init_winfsp();
__sync_synchronize(); /* memory barrier */
cygfuse_handle = handle;
}
pthread_mutex_unlock(&cygfuse_mutex);
return handle;
}
/*
@ -51,7 +67,7 @@ static inline int cygfuse_daemon(int nochdir, int noclose)
return -1;
/* force reload of WinFsp DLL to workaround fork() problems */
cygfuse_init(1);
cygfuse_init_slow(1);
return 0;
}
@ -59,7 +75,7 @@ static inline int cygfuse_daemon(int nochdir, int noclose)
#define FSP_FUSE_API static
#define FSP_FUSE_API_NAME(api) (* pfn_ ## api)
#define FSP_FUSE_API_CALL(api) (cygfuse_init(0), pfn_ ## api)
#define FSP_FUSE_API_CALL(api) (cygfuse_init_fast(), pfn_ ## api)
#define FSP_FUSE_SYM(proto, ...) __attribute__ ((visibility("default"))) proto { __VA_ARGS__ }
#include <fuse_common.h>
#include <fuse.h>
@ -75,6 +91,7 @@ static inline int cygfuse_daemon(int nochdir, int noclose)
if (0 == (*(void **)&(pfn_ ## n) = dlsym(h, #n)))\
return cygfuse_init_fail();
static void *cygfuse_init_fail();
static void *cygfuse_init_winfsp()
{
void *h;