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semaphore.h: Add SEM_VALUE_MAX.

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It's specified in POSIX, and FreeBSD puts it in this file.

Distinguish it from _POSIX_SEM_VALUE_MAX (which is really a
"minimum value this can have" as specified in POSIX.)
This commit is contained in:
Augustin Cavalier
2026-01-06 19:40:23 -05:00
parent ca5c5d531e
commit d763a3829a
4 changed files with 5 additions and 4 deletions
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headers/posix/semaphore.h
+2 -1
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@@ -21,7 +21,8 @@ typedef struct _sem_t {
int32_t padding[2]; int32_t padding[2];
} sem_t; } sem_t;
#define SEM_FAILED ((sem_t*)(long)-1) #define SEM_FAILED ((sem_t*)(long)-1)
#define SEM_VALUE_MAX INT_MAX
__BEGIN_DECLS __BEGIN_DECLS
headers/private/system/posix/realtime_sem_defs.h
-1
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@@ -11,7 +11,6 @@
#define MAX_POSIX_SEMS_PER_TEAM _POSIX_SEM_NSEMS_MAX #define MAX_POSIX_SEMS_PER_TEAM _POSIX_SEM_NSEMS_MAX
#define MAX_POSIX_SEMS 1024 #define MAX_POSIX_SEMS 1024
#define MAX_POSIX_SEM_VALUE _POSIX_SEM_VALUE_MAX
#endif // SYSTEM_REALTIME_SEM_H #endif // SYSTEM_REALTIME_SEM_H
src/system/kernel/posix/realtime_sem.cpp
+1 -1
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@@ -679,7 +679,7 @@ _user_realtime_sem_open(const char* userName, int openFlagsOrShared,
if (context == NULL) if (context == NULL)
return B_NO_MEMORY; return B_NO_MEMORY;
if (semCount > MAX_POSIX_SEM_VALUE) if (semCount > SEM_VALUE_MAX)
return B_BAD_VALUE; return B_BAD_VALUE;
// userSem must always be given // userSem must always be given
src/system/libroot/posix/unistd/conf.cpp
+2 -1
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@@ -8,6 +8,7 @@
#include <errno.h> #include <errno.h>
#include <limits.h> #include <limits.h>
#include <semaphore.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
@@ -96,7 +97,7 @@ __sysconf(int name)
// unlimited, instead of _POSIX_SEM_NSEMS_MAX // unlimited, instead of _POSIX_SEM_NSEMS_MAX
return -1; return -1;
case _SC_SEM_VALUE_MAX: case _SC_SEM_VALUE_MAX:
return _POSIX_SEM_VALUE_MAX; return SEM_VALUE_MAX;
case _SC_IOV_MAX: case _SC_IOV_MAX:
return IOV_MAX; return IOV_MAX;
case _SC_NPROCESSORS_CONF: case _SC_NPROCESSORS_CONF: